Passive wireless temperature measuring device

The utility model relates to the technical field of temperature measuring equipment, and particularly discloses a passive wireless temperature measuring device which comprises a shell, a sealing coverplate and a mounting seat, a wireless receiving and transmitting unit and a controller are arranged in the shell, a fixed sleeve is arranged on the upper portion of the shell, and a temperature measuring probe is arranged in the sleeve. A temperature sensor is arranged on the temperature measuring probe, and the temperature sensor and the wireless receiving and transmitting unit are both electrically connected with the controller; a mounting groove is formed in the upper opening of the shell, a sealing cover plate is arranged in the mounting groove in a matched mode, and the sealing cover plate is fixedly connected with the mounting groove through screws. A mounting base is arranged on the back side of the shell and provided with a guide rail in a matched mode, and the guide rail is fixedly mounted. According to