It is pointed out that the axial compression ratio is the main factor affecting the displacement ductility coefficient μ of frame joints. Taking the seismic performance test of T shaped and cross shaped ECC frame joints as the prototypes，the calculation model of frame joints is established based on the CDP model in the finite element software ABAQUS，and the reliability of the calculation simulation has been verified by comparing with the test results. Based on this，the calculation models of ECC frame joints with axial compression ratio of 0.3，0.5，0.7 and 0.9 are established to study the influence of axial compression ratio n on seismic performance of different types of ECC joints. The results show that：the axial compression ratio has a significant impact on the seismic performance of ECC frame joints；the energy dissipation capacity，stiffness degradation and displacement ductility coefficient of T shaped and cross shaped joints are negatively correlated with the axial compression ratio（0.5~0.9），and the failure mode is ductile failure；while under the same axial compression ratio（0.3~0.7）and loading history，the seismic performance of T shaped joints is better than that of cross shaped，and the displacement ductility coefficient μ increases by 4.1%~35.1%. In order to ensure the seismic performance of ECC frame joints，it is suggested that the axial compression ratio should be controlled at about 0.5.