To investigate the influence of multiple parameters on the shear performance of (PZ shear connector) in composite beams, explore the influencing factors of the shear bearing capacity of PZ shear connectors, and provide reference for the design of steel-concrete composite structures, this paper adopts a push-out test method, with the shape of the connector opening shape and the diameter of the penetrating steel rebars as control parameters, and designs and conducts two sets of monotonic static pushout tests of six PZ shear connectors. The failure mode, shear bearing capacity, shear stiffness ductility, and load-slip curves of the PZ shear connector specimens were obtained through experiments; Emphasis was placed on the influence of the shape of the opening of the PZ shear connector under static load and the diameter of the penetrating reinforcements on the shear bearing capacity of the shear connector. The experimental results show that the PZ shear connector in composite beam has excellent shear resistance performance.