The present invention discloses a torque loading test method suitable for complex switching working conditions, comprising a main drag motor, a loading motor, a
coupling, an external overrunning
clutch, a main speed increasing box, a torque meter, a gear box built-in friction
clutch, a
bevel gear box, a test piece casing, a casing built-in overrunning
clutch, a
starter end speed increasing box, and a starting motor: the main drag motor is connected to the main speed increasing box through a
coupling and an external overrunning clutch, the loading motor is connected to the main speed increasing box through a
coupling and a torque meter, the main speed increasing box is connected to the
bevel gear box through a coupling and a torque meter, the
bevel gear box is connected to the test piece casing through a coupling, the
starter input interface of the test piece casing is connected to the
starter end speed increasing box through a torque meter and a coupling, and the starter end speed increasing box is connected to the starting motor through a coupling. The present invention has the characteristics of high reliability, real-time adjustment, accurate numerical value, and can be improved and expanded according to experimental requirements.