The present invention discloses an electronic time-delay part performance testing device of a guided ammunition. The device comprises an industrial personal computer, a router, an oscilloscope, a digital multimeter, a function generator, a program control power supply, a selection switch, a digital I/O module, a conversion circuit, a switching control circuit and a pulse generation circuit. The electronic time-delay part performance testing device of the guided ammunition is able to perform inspection and simulation of the characteristic parameters, the operation time sequence, data communication and the like of the electronic time-delay parts and monitor the whole test condition; the electronic time-delay part performance testing device of the guided ammunition is flexible in configuration, convenient to use and simple to operate; the electronic time-delay part performance testing device of the guided ammunition has high scalability, and is able to complete the test requirement of a new type of the guided ammunition electronic time-delay parts according to the invention and satisfy the test requirement of the digital guided ammunition electronic time-delay parts; and moreover, the electronic time-delay part performance testing device of the guided ammunition has a self-checking function and a device calibration interface to facilitate regular calibration of the device.