The utility model provides a check valve equipment of a differential-pressure amplification type, and the equipment comprises a container, and two ends of the container are opening. The upper and lower ends of the container are respectively equipped with an upper cover plate and a lower cover plate, wherein the upper and lower cover plates are respectively equipped with a water hole. An upper inverted filter is disposed under the upper cover plate, and a lower inverted filter is disposed on the lower cover plate. The central part of the container is equipped with a water-turning machine member and a differential-pressure amplifier. Side drainage channels and a central drainage channel are respectively formed in the water-turning machine member, wherein the side drainage channels are respectively located at two sides of the differential-pressure amplifier, and the central drainage channel is located at the upper part of the differential-pressure amplifier and communicated with the side drainage channels. The differential-pressure amplifier cooperates with the water-turning machine member, thereby gathering water current in the side drainage channels and leading the water current to the central drainage channel for on-off control. According to the utility model, water leakage does not happen in the conditions of small hydraulic head and big hydraulic head, and the drainage flow quantity of the equipment can meet the requirement of a large drainage quantity. The equipment is long in service life, is easy to install and construct, is simple in structure, and can achieve large-scale production.