Radio frequency card water meter controller capable of realizing stepped charging

The utility model relates to the technical field of water meter installation, and discloses a radio frequency card water meter controller capable of realizing stepped billing, which comprises a shell, a water inlet is fixedly connected to the outer side of the shell, a water outlet is fixedly connected to the outer side of the shell, a first sealing ring is fixedly connected to the inner wall of the water outlet, and a second sealing ring is fixedly connected to the inner wall of the first sealing ring. The outer side of the water outlet is sleeved with a connector, and the inner wall of the connector is fixedly connected with a second sealing ring. According to the step water price radio frequency card water meter controller convenient to install, in the working process, the limiting groove and the clamping block arranged in a matched mode are arranged, the clamping block enters the inner side of the limiting groove in the using process, the clamping block and the limiting groove are connected in a clamped m