The invention discloses a wet-type environment-friendly leaf treatment device which comprises a treatment box and a suction cylinder, wherein the right end of the suction cylinder communicates with the upper side of the left portion of the treatment box, and meanwhile, an outlet is formed in the upper portion of the right side of the treatment box and communicates with a discharging barrel. The treatment box communicates with a water inlet pipe, and a sewage discharging outlet is formed in the lower portion of the treatment box and provided with a valve, and meanwhile, a rotating roller is arranged on the left portion of an inner cavity of the treatment box. An elastic hook prepared from an elastic steel wire is arranged on the circumferential surface of the rotating roller, and the treatment box is provided with a selection port, a horizontal reciprocating rod capable of moving in a left-right repeated mode is arranged in the selection port in a penetrating mode, and a strainer matched with the elastic hook is arranged at the right end of the horizontal reciprocating rod. The wet-type environment-friendly leaf treatment device has the advantage that leaves and plastic bags in rubbish can be separated well.