The invention discloses a multi-model smooth and stable switching control method for increase and decrease of state variables. The multi-model smooth and stable switching control method comprises the following steps of S1, decomposing a system motion control model into multiple submodels to construct a motion control model set; S2, setting a control strategy and switching control laws according to the characteristics of the submodels; S3, judging whether to switch or not according whether various states of the motion system meet the expected quality control requirement or not; if yes, performing no switching, otherwise, performing switching according to the switching strategy in the second step. According to the multi-model smooth and stable switching control method disclosed by the invention, the system motion control model is decomposed into the multiple submodels to construct the motion control model set, and then the control strategy and the switching control laws are set according to the characteristics of the submodels, so that a jitter phenomenon caused by increase and decrease of the state variables before and after switching can be effectively solved; in addition, the implementation and the verification are facilitated, the calculated amount in the switching process is effectively reduced, and the stability of the switching process of a switching system is improved.