Through the theoretical analysis of shortcircuit current and shortcircuit torque in the steadystate shortcircuit condition of permanent magnet synchronous motor (PMSM), the analytical expressions of steadystate shortcircuit current and electromagnetic torque of PMSM were obtained. Combined with twodimensional finite element method, the shortcircuit current and shortcircuit torque of a 180 kW PMSM under shortcircuit condition were simulated and calculated. The variation law of shortcircuit current and shortcircuit torque versus speed of the PMSM during the steadystate shortcircuit test was determined. The threephase steadystate shortcircuit test was carried out for a PMSM. The shortcircuit current and shortcircuit torque at different speeds were recorded during the shortcircuit test. The test results were compared with theoretical analysis and simulation analysis results to verify the variation law of shortcircuit current and shortcircuit torque versus the speed.