In order to improve the accuracy of safety assessment of structure of in-situ rein-forced concrete floor after reinforcement,the deflection,strain and crack of the floor were simulated by ANSYS software,and compared with the static load test results.The deformation,crack and bearing capacity of in-situ reinforced concrete floor after reinforcement of a residential building were analyzed.The results show that the crack development of the floor obtained from the static load test is basically consistent with the ANSYS software simulation results,and the theoretical calculation values of the floor deflection and strain are basically consistent with the measured values;when the floor is in the elastic stage,the deflection of the floor under the self weight load can be calculated by the fitting equation with the load and deflection data.This study can provide some reference for the relevant test analysis in the future.