The invention discloses an automatic double-ring water penetration testing instrument. The automatic double-ring water penetration testing instrument comprises an upper water tank, a middle double-ring device and a lower double-ring base. The lower double-ring base comprises an inner-ring base body and an outer-ring base body, the middle double-ring device comprises an outer ring and an inner ring, an inner ring water outlet device and an inner ring water level monitoring device are arranged on the inner side of the inner ring, and an outer ring water outlet device and an outer ring water level monitoring device are arranged between the inner ring and the outer ring. The upper water tank comprises a tank body, an inner ring water flow control device and an outer ring water flow control device are arranged at the bottom of the tank body, and a data recording display and control device is arranged on the tank body and connected with the inner ring water level monitoring device, the outer ring water level monitoring device, the inner ring water flow control device and the outer ring water flow control device. In the testing process, the automatic double-ring water penetration testing instrument does not need to be manually controlled, water supply and reading are automatically completed, manual errors are reduced, and the automatic double-ring water penetration testing instrument has the advantages of being easy and convenient to operate and high in precision.