The invention discloses a low-temperature testboard of sensor equipment. The testboard is characterized by comprising a thermostat, an integrated tool bench and a pre-loading device; the thermostat isinternally provided with a liquid helium pool, and the integrated tool bench is positioned in the liquid helium pool; the pre-loading device comprises a vacuum tube, a transmission unit and a force loading control unit, the transmission unit is positioned in the vacuum tube, the force loading control unit is connected with the transmission unit and is in sealing connection with the vacuum tube, and the vacuum tube is in sealing connection with a top opening of the thermostat via a flange; and the outmost layer of the integrated tool bench includes a vacuum box, the vacuum box is in sealing connection with the vacuum tube of the pre-loading device, the vacuum box is internally provided with a test tool for installing the sensor equipment to be tested, and the transmission unit in the vacuum tube is connected with the test tool. According to the testboard, test is low in cost, high in efficiency and convenient to operate, and low-temperature sensor performance is easy to measure under continuous temperature change.