The finite element model of 20 kN/8.7 m wallsleeving crane was built based on the finite element software ANSYS. The stress condition of cantilever beam was analyzed respectively under the condition that the load was applied at two special positions of the span end and the middle of the span. The natural frequency and mode shape of the first ten modes were obtained through modal analysis. Combined with harmonic response analysis, it is concluded that the natural frequencies of the second order and eighth order vibration were the most easily resonant frequencies of the wallsleeving crane. The finite element model of the wallsleeving crane was analyzed from static and dynamic aspects to provide reference for dynamic optimization design of mechanical structure. The research results are helpful to select suitable equipment parameters in actual operating conditions.