The Kingdom of Wei of northern expedition Cao is prime minister of the kingdom of Shu Han Zhuge Kongming starts to political power of Cao the Kingdom of Wei for many times massive campaign, time expends several years, threw many armed forces, can says is to lift countrywide force to have northern expedition. Later ages is very much the scholar thinks Zhu Geliang has northern expedition is to be without necessary, even the viewpoint says northern expedition has disadvantage to do not have advantage only, nevertheless the author thinks Zhu Geliang northern expedition is very those who be necessary, and must northern expedition, and because ability of regime of northern expedition the kingdom of Shu Han continues to live smooth and steadily,also go down, northern expedition reflected Zhu Geliang he to the world general trends hold and his long-term strategy vision, we should affirm the positive effect of Zhu Geliang northern expedition. Above all the setting that we can analyse northern expedition and motive, the afterwar ability that starts exterminate hill in Liu Bei begins northern expedition to prepare in succession, disastrous defeat of main forces of equipment of the Liu in the battle of exterminate hill, remain thousands of damage only army remove Bai Dicheng of fall back on, national power drops quickly, and smooth of hill afterwar did not pass how long did Liu Bei also die. The negative effect of the battle of exterminate hill begins to expand slowly then, above all Sichuan country home happened serious revolting, southern also the war since frequency, northward Cao Wei is eye covetously more. The author thinks in this the condition that has inside the care outside planting falls, zhu Geliang can hit out actively only with the kingdom of Shu Han, hit Sichuan ground, can be in Sichuan ground only otherwise await one's doom, final by annex. And of exterminate hill afterwar, in the shadow that the kingdom of Shu Han is in a war to fail all the time, domestic pressure is very great, he is badly in need of Zhu Geliang the confidence that a victory will come to to pick up people of the kingdom of Shu Han again. But the motive with the mainest northern expedition still originates Cao Wei, accordingly right now Cao Wei has prepared Na Zhengsun to counterpoise, if when after Cao Wei gets ready completely, so political power of the kingdom of Shu Han also will be between the beetle and the block. Those who change character, even if not to resist Cao Wei, northern expedition also is very be necessary, because the kingdom of Shu Han is in the ground of the strategic place of hill of all sides annulus, bad to enter but bad also to go out, had carried in this battle in exterminate hill came out now, because the reason of relief strategic place brings about logistics to do not have safeguard,at that time also is. Say northern expedition reflected Zhu Geliang's wisdom so, all Ge Liang's very clear knowing cannot grow be on Sichuan ground, otherwise bully course of study cannot be become, and promote the will of Chinese room also won't come true. So fall in this kind of circumstance, he can start northern expedition in an attempt to to get a favourable turn only, of course northern expedition also obtained many positive result, so achievement body now Where is what respect? Reflect above all go up in the strategy, the kingdom of Shu Han is in a battle of first time northern expedition is medium fetched very big gain, arms of Zhu Geliang rate captured Gansu right and other places of Cao Wei, outspread the territory of the kingdom of Shu Han, established next the foundation of northern expedition. Although first time northern expedition suffers a defeat in the battle that the street wells balanced, but the kingdom of Shu Han still made pretty good gain. In 2, 3 times the kingdom of Shu Han in northern expedition also gained a few victory, nevertheless the author thinks to be in biquadratic northern expedition, it is the kingdom of Shu Han taking victory is the biggest, in the belligerence with enemy, zhu Geliang sends an army suddenly appearing from nowhere for many times, 3 converging attack, smash weak point of Wei Jun, annihilated a large number of army of Wei Guo, make the Kingdom of Wei adopts Si Mayi avoid battle is politic, or else dare be at war. But as a result of dispute of interior of the kingdom of Shu Han, zhu Geliang is removed finally army, did not continue to enlarge results of battle, this is the place with the most mournful northern expedition the 4th, of course of Si Mayi avoid war strategy also had very big effect. If Zhuge is bright can exploit a victory is pursued and attack, so warlike outcome can adapt probably. The author thinks northern expedition did not procrastinate break down Sichuan country, pass a war a few times instead, the negative effect of the battle of exterminate hill is swept and empty, also strove for for the kingdom of Shu Han at the same time with time of opposed of Cao the Kingdom of Wei and space, there also is a loss in the kingdom of Shu Han in northern expedition of course, be in than the kingdom of Shu Han with these photographs nevertheless the loss in the battle of northern expedition is to not worth to be carried, but after suffer from Zhu Geliang dies of illness, sichuan country again unmanned can carry a big banner. If do not have northern expedition, so the kingdom of Shu Han is met how, after Sun Wu of annex of Cao the Kingdom of Wei, the kingdom of Shu Han what course to follow. So the author thinks northern expedition is very well-advised choice, its hit out actively and the strategy of anticipate the enemy is worth us to consider and think.