The invention relates to a pressure limiting and stabilizing valve, pertains to the pressure controlling arrangement for tap water, which comprises a water inlet, a casing of a water outlet, and an upper cover and a lower cover. The upper cover is sealedly connected with the casing through a flexible upper seal film; the lower cover is sealedly connected with the casing through a flexible lower seal film; between the water inlet and the water outlet, a partition board with a water-through port is provided; between the upper and the lower cover, a control rod is provided; the inner and outer side of the flexible upper seal film and the flexible lower seal film are provided with an upper cover support, an upper film presser, as well as a lower cover support and a lower film presser for sealedly connecting the controlling rod; on the controlling rod, a seal piece corresponding to the water-through port is fixed; the partition board is connected with a limit; on the controlling rod between the limit and the lower film presser, a spring is provided. The invention is of small size, high strength, high practicability, integrates a plurality of such functions as pressure limiting, stabilizing, and water-hammer eliminating, etc., allows the end users of the water supply pipe network from the municipal engineering not worrying about any water leakage because the water treatment system is damaged by high pressure.