Abstract: Firstly, using LSDYNA software, a CFRP/AA6061 composite tube model was established with CFRP wrapped around the outer wall of aluminum alloy tube to study suitable crushing simulation method. And then, the MAT54 and MAT123 material models were used respectively to simulate the constitutive relation of CFRP and AA6061. The normal failure stress and shear failure stress at the interface between CFRP and AA6061 were determined by calibrating parameters, and the interface was defined according to tiebreak contact type. Finally, taking the composite structure with different angle fiber layers as the object, a crush test was carried out to validate the simulation model. The results show that, the simulation model constructed in this paper presents high precision and can reflect well the peak crush force and mean crush force during the test. The simulation error of0/90<sub<3</sub< and90<sub<6</sub< layer composite tube can reach 8% and 11.2% respectively for peak crush force,8.7% and 6.7% respectively for mean crush force. This model can also simulate the axial crushing performance and failure mode of the composite structure. This model can be used for the crushing test and simulation study of CFRP/aluminum alloy composite thin-walled structures.