The invention relates to the technical field of wires and cables, in particular to a low-temperature tensile test device for wires and cables. The test device comprises a casing arranged in a horizontal structure, a work cavity and an air duct are arranged in the inner front half part of the casing, a refrigeration assembly and an electrical control assembly are arranged in the back half part of the casing, an upper tensile test hole is arranged just in the top center of the work cavity, a lower tensile test hole is arranged just in the bottom center of the work cavity, the work cavity is connected with the air duct, a multi-wing circulating fan is mounted at the top in the air duct, a temperature sensor, an electric heating wire and a refrigeration evaporator are installed under the multi-wing circulating fan, the refrigeration assembly comprises the evaporator, an electromagnetic valve, a refrigeration compressor, a drying filter and a condenser which are welded through copper pipes,and the electrical control assembly comprises a temperature control instrument, a circuit breaker, an alternating current contactor, a solid-state relay, a transformer and an intermediate relay.