Ultrasonic water meter

An ultrasonic water meter comprises a meter body and a meter cover. The meter body comprises a measuring pipeline and a lower shell which are integrally formed, an ultrasonic probe group is arranged in the lower shell, the ultrasonic probe group comprises a transducer, a temperature sensor, a switching circuit board, a battery and a circuit board, the transducer, the temperature sensor and the battery are electrically connected with the switching circuit board, and the switching circuit board is electrically connected with the circuit board; the measuring pipeline comprises a liquid inlet, a liquid outlet and a flow guide cavity, the liquid inlet and the liquid outlet are provided with reflector plates, and the transducers are arranged at the two ends of the flow guide cavity and are opposite to the reflector plates; the meter cover comprises a first shell, a second shell and a turning cover, the first shell and the second shell are connected through interference friction fit, the turning cover and the first