Althought Simple jack-up type intelligence stereo parking space to ease the parking problem in public,its bedplate frame occurred deformation in the process of rising. reduced stereo parking space stability,shorten the working life of the stereo parking space. Deformation of the frame belongs to the nonlinear structure problem. First established the mechanical model framework to solve the deformation of frame,and caculated the overturning moment,bearing force,the strength of the frame.Second using finite element analysis software ANSYS-workbench module to the rotary column in the 0°and 90°two condition of the framework for the calculation of mechanical property simulation,in order to obtained the deformation amount,the deformation direction the principal stress and the maximum stress position under the two conditions. Finally,the deformation test of the sample machine with software of test system. According to the test result validates the mechanical model,according to the analysis result showed the problems,and proposed frame suggestions for improvement,provided an important reference value to improve the stereo parking space stability.