The utility model is characterized in that: a water inlet pipe, a water distributor cylinder, a water distributing device inner cover, a water distributing central pipe, an annular overflow water tank, an air duct and a jet device. One side of the water distributor cylinder body is provided with the water inlet pipe, water distributor cylinder water distributor is arranged in the water inlet pipe cover, water up to the water distribution center tube, ring around the water overflow into the cloth from the first tube in the center of the upper part of the overflow tank, the overflow tank is communicated with the annular jet, when the water jet from the lower part of the when the outflow caused by gas chamber pressure and air through the air duct into the jet chamber, water jet to the outside, so that the impulse water distributor upper air continuously reduced, and ultimately the formation of siphon phenomenon. The utility model increases the jet device, and solves the problem that the impulse water distributor is naturally formed by a siphon. Its originality, no need to adjust, so that the pulse water distributor is more easy to run.