The invention discloses a multifunctional rotary switch tester, which comprises a machine frame, a test bed, a display screen, an input device, a control system and a load, wherein, the test bed comprises a plurality of test units; each test unit is provided with a switch fixture which is correspondingly provided with a stepper motor and a switch rotating shaft grip holder which is driven to rotate by the stepper motor; the control system comprises a controller, a motor driver, a counter, a sampling circuit and a temperature controller; control software is arranged inside the controller; the display screen ,the input device, various stepper motors and the load are accessed into the control system. The tester of the invention is a device which integrates a plurality of test functions like service life test, temperature rise test, on-off capacity test and so on into a whole and completely improves the defects of the prior tester which are respectively bulkiness, non-tunable detect, small capacity, inconvenient assembly, high cost and so on.