The invention discloses a superconducting switch for conduction cooling and a superconducting magnet device thereof. The superconducting switch comprises a switch framework, and a switch superconducting coil, a switch cold conduction coil and a switch heating coil which are wound on the switch framework, wherein the switch superconducting coil and the switch cold conducting coil are wound at intervals, a copper cable and a current lead are led out from the two ends of the switch superconducting coil respectively to form a four-wire method resistance measuring circuit, and whether the superconducting switch enters a quench or non-quench state is judged by detecting the coil resistance. The two ends of the switch cold conduction coil are thermally connected with a cold head of the superconducting magnet device, the switch heating coil is wound by being attached to the switch superconducting coil, and the copper cables are led out from the two ends of the switch heating coil and are usedfor conducting a current to heat the switch superconducting coil. According to the invention, the problem of low cooling efficiency of the conduction cooling superconducting switch, the problem of thereal-time detection of the cooling states of the superconducting switch and the main superconducting coil, and the problem of coil charging and discharging and coil protection of the conduction cooling superconducting switch used for conduction cooling of the superconducting magnet are solved.