Zhuge Liang's "Six Visits to Qishan" failed to complete the great cause of unifying the "Northern Central Plains", not only because he could not get it, but also because of both objective and subjective reasons: 1 (234) In the 12th year of the founding of the State of Wei, Zhuge Liang worked day and night to attack the front camp of Wei, which was not only unfavorable for conquering Wei, but also a huge loss for politics itself. Although Jiang Wei took over the front line command, there was always a shortage of talents and no successors. 2. Relatively speaking, the formation climate of Shu-Han regime was later than that of Cao Wei and Sun Quan. After the battle of Yiling, the military strength was far inferior to that of Wei and Wu. Compared with Cao Wei, who has many talents and extensive knowledge, it is far from enough. The slogan of "Reviving the Han Dynasty" has long lost its appeal and appeal. The corrupt politics of the Eastern Han Dynasty has long been completely lost in people's minds. Peasant uprisings broke out one after another. "Heaven dies, Huang Tianli!" 4. Huang Hao, the courtier of Shu Han Dynasty, was autocratic, and the ruler was dark and defensive emptiness. Even if Jiang Wei fought hard at the front, it would be difficult to save the crisis. The latter had already taken Wei as a prisoner and entered the Palace of Happiness. 5. The key to the Northern Expedition is profound human error, such as Ma Su's loss of street kiosks, Li Yan's loss of rations and excellent fighter planes. Now or never. 6. After the capture of Longyou, a solid political and military base was not established, and grain and grass were often exhausted, land was recovered, and many favorable factors of Longyou were not fully utilized. 7. The measures of stationing troops and guarding the border are not effective, the supply of military supplies at the front line is not smooth, and the food is often run out. At the same time, Cao Wei took effective reform measures to develop the economy and make the country strong. To sum up, summing up the success or failure lessons in the relationship between Zhuge Liang's "six trips to Qishan" and "Beiding Central Plains" clearly shows that if the country wants to be rich and strong, the people want to be rich, the nation wants to prosper, and the cause wants to develop, it must rely on the people, seek benefits for the people, get their support and support, and strive to cultivate a large number of talents; Promote advantages and eliminate disadvantages, fight corruption and punish corruption; Strengthen national unity; Seize the opportunity, lose no time, and rationally employ people; Develop productive forces, develop the economy and improve the comprehensive strength of the country. Otherwise it's hard to get what you want.