Abstract: The assembled floor slab that applied in modular assembled high-rise steel structure is a discontinuity slab． As for its assembled slot，assembled slab has an insufficient plane stiffness，which effect its integrity function． To insure the plane stiffness and integrity of assembled slab，three kinds of connectors were designed，i． e． beam connector，slab connector and beam-slab connector． Considering connector types and connector spacing，ABAQUS was used to analyse a failure character of floor slab，bearing capacity，slab slot shear rigidity，stress transmission capacity between slab slot and the slot value of assembled shear slab， to obtain the performance and the force transmission effect of the slab slot． The analysis results show that the connector spacing is the main factor affecting the plane stiffness of assembled slab，just adopting only beam connector cannot control slab slot well，slab connector and beam-slab connector are the effective connections in assembled slab slot． It is suggested that the slab connector spacing and the beam-slab connector spacing should be controlled within 0. 75 m and 1. 0 m respectively．