Power supply control box for water heater

The utility model discloses a power supply control box for a water heater, which comprises a lower box body, the lower box body is provided with a fixing block, a fixing hole, a boss, an L-shaped slot, a pressing block and a bump, the lower box body is matched with an upper box body, the upper box body is provided with a limiting groove and a tough buckling block, and the lower box body is provided with a wire inlet and a wire outlet. The wire inlet hole and the wire outlet hole are integrally connected with a wire pipe, a threaded groove is formed in the wire pipe, an umbrella-shaped openingis integrally formed in the wire pipe, the wire pipe is matched with a wire fixing head, the wire fixing head is provided with a thread matched with the threaded groove, a disc is integrally arrangedon the wire fixing head, the disc is connected with a twisting block, and the wire fixing head is connected with a soft rubber head. Through holes are formed in the wire fixing head, the disc and thesoft rubber head, a battery