The invention discloses a self-discharging vehicle whole vehicle lifting reliability testing device and a self-discharging vehicle whole vehicle lifting reliability testing method. The self-discharging vehicle whole vehicle lifting reliability testing device comprises a control system and an execution mechanism. The control system comprises a first programmable time relay, a second programmable time relay, a third programmable time relay, and a counter. The signal input end of the counter is respectively connected with the output ends of the time relays, and the reset plug of the first programmable time relay and the reset plug of the second programmable time relay are respectively connected with the output end of the third programmable time relay. The self-discharging vehicle whole vehicle lifting reliability testing device is advantageous in that the time relays are used to control a clutch, an accelerator, a lifting valve, and a lowering valve sequentially, and the lifting operation, the lowering operation, and the stopping operation are carried out automatically, and testing times are recorded automatically; when a temperature exceeds a standard, and an angle exceeds the standard, automatic combination with a fuel-cut off switch is carried out, and an engine is turned off, and in addition, an operator is not required to stay in the vehicle; the device is simple in production, convenient in operation, and high in reliability, and is used to verify the reliability in different loads.