Based on the push-out test of the improved PBL shear connector, a finite element modal was established. In the FEA software of ANSYS, element type of Solid65 was adopted to simulate concrete; element type of Solid45 was adopted to simulate perforated rebar and steel plate, and element type of Conta173 and element type of Targe170 were adopted to simulate the interaction between perforated rebar and concrete, corrugated perforated plates and concrete. From the calculation of finite element modal, carrying capacity of the shear connector and the relative slip between steel plate and concrete were got. By comparing, the result of experiment is well with the result of calculation. Furthermore, the finite element modal is used to simulate mechianial properties of double row holes PBL shear connector. From the result of calculation, it can be concluded that the carrying capacity of double row holes shear connector is higher than the single row hole shear connector.