To explore the mechanical properties of the stud connectors under fatigue loading in steel-concrete composite structures,static,fatigue and non-complete fatigue loading tests for stud connectors were conducted. Based on this,the existing non-complete fatigue push tests for stud connectors were summarized. Two parameters including fatigue life cycle and residual shear capacity were normalized,making all the tests comparable; in addition,based on residual strength theory,an applicable residual bearing capacity model of the stud connectors was developed and the parameters were fitted by the test data. Finally,the established model was verified through the data in literature. The results show that the residual bearing capacity of stud connectors presents a nonlinear trend of ‘slow first and fast later’ after fatigue loads. The proposed exponential degradation model can well describe variation law of residual shear capacity of the stud connectors under a certain number of fatigue loads.