Water supply pipe leakage detector based on secondary checking

The utility model relates to a leakage detector, and particularly to a water supply pipe leakage detector based on secondary checking. According to the water supply pipe leakage detector based on the secondary checking, a single-chip microcomputer module is respectively connected with a sensor module, a power supply module, a data input module, a display module and a checking single-chip microcomputer module; and the checking single-chip microcomputer module is respectively connected with a checking sensor module, a checking power supply module and an alarming module. The water supply pipe leakage detector settles problems of pipe breakage and tap water leakage caused by the reasons of pipe unrepair for long time period in the daily water supply pipe system. Furthermore the detection result reliability is improved through performing rechecking operation to the leakage information.