Underground water pipe leakage detection device

The utility model discloses a water leakage detection device for an underground water pipe, which relates to the technical field of leakage listening instruments and comprises a host, a sensor probe capable of being connected with the host through a connecting line and used for listening detection, a listening rod capable of being fixedly connected to the bottom of the sensor probe and inserted into soil, an earphone in communication connection with the host and a support. The sound listening rod can be detached; the sensor probe can be fixedly connected to the bottom of the support, a spray pipe is fixedly arranged on the support, at least one spray hole is formed in the bottom of the spray pipe, a spray head is arranged at each spray hole, the spray pipe is filled with colored pigment, a piston is arranged in the spray pipe, and the colored pigment in the spray pipe can be sprayed to the ground by pressing the piston. The underground water pipe water leakage detection device provided by the utility model ca