In view of xx type of low-cost trajectory correction rockets's project approvement the background of the rocket's development, correction techniques and basic principles were analyzed with the combination of qualitative and quantitative analysis, especially AHP to study and sequence advantages and disadvantages of candidate schemes. Through analyzing, the conclusion reached is that the magsat scheme is best for project development, and the scheme of MEMS takes second place. However, because of it is independent of satellite' s measurement and control, the scheme of radio measurement and control has well complementary advantages with magsat scheme in practical application.