The invention discloses a multifunctional temperature sensor detector comprising, in a housing, a master control circuit unit, a voltmeter, an ammeter, a withstand voltage detection circuit unit, a power frequency impact detection unit, a power circuit unit for providing direct current for a test system, and a relay for turning on and off power supply. The master control circuit unit sends an on-off control instruction to the relay. The voltmeter and the ammeter acquire the voltage data and the current data of the withstand voltage detection circuit unit and the power frequency impact detection unit respectively, and send the data to the master control circuit unit for data processing. The multifunctional temperature sensor detector further comprises a resistance meter and a zero-power resistance detection circuit unit. The resistance meter acquires the resistance data of the zero-power resistance detection circuit unit, and sends the resistance data to the master control circuit unitfor data processing. The housing is equipped with a cooling fan and a working status indicator. Such structure can conveniently and comprehensively test the zero-power resistance, the withstand voltage and the withstand power frequency impact of the temperature sensor.