Abstract: In order to realize a safety and reliable operation of the sinking platform in the ultra deep mine shaft construction, a APDL language based on ANSYS wa s applied to the parameter modeling and the strength analysis on the sinking platform.A stress cloud chart of the sinking platform under the working condition was obtai ned and a zero order optimization algorithm was applied to optimize the structure of the sinking platform.With the analysis, the following conclusions obtained, when ea ch floor structure and material of the three floor sinking platform was same, the stress conditions of the first two floor sinking platforms were similar and the stress of th e major beams was about 55 MPa.The third floor platform would have higher stress than the above two floor platforms, the partial area of the third floor platform would have the stress about 300 MPa and would be close to the yield strength of the beam.A structure optimization conducted on the third floor platform would be favorable to make the sinking platform to meet the strength requirement and the material required to the manufacturing would be economic.