Temperature measuring device for measuring temperature of flowing water body

The invention discloses a temperature measuring device for measuring the temperature of a flowing water body. The device comprises a detector, wherein a cavity is arranged in the detector, a water inlet pipe and a water outlet pipe are respectively arranged at two ends of the detector, each of the water inlet pipe and the water outlet pipe comprises a central axis, and a space is reserved between the central axis of the water inlet pipe and the central axis of the water outlet pipe; a pipe wall of the water outlet pipe extends towards the interior of the cavity, a containing groove is formed between the pipe wall and the inner wall of the detector, a temperature sensor used for detecting the water temperature is arranged in the containing groove, a through hole is formed in the side, close to the temperature sensor, of the pipe wall, and the through hole is used for communicating the water outlet pipe with the containing groove. The device can more accurately measure the temperature of the flowing water body.