The invention discloses a water-hammer-resisting stop valve, which comprises a valve body. A water inlet and a water outlet are formed in the two ends of the valve body correspondingly and communicatethrough a valve body inner cavity, a communicating opening is formed between the water inlet and the valve body inner cavity, and a valve deck is arranged at the upper end of the valve body; a valverod is arranged on the valve deck, the upper end of the valve rod is connected with a hand wheel, and the lower end of the valve rod penetrates through the valve deck and extends to the valve body inner cavity; valve flaps are arranged at the lower end of the valve rod, and water-hammer-resisting devices are arranged between the valve body and the valve flaps, wherein the valve flaps are each of ahollow structure, and inner cavities of the valve flaps are composed of sliding holes and water inlet holes; the water-hammer-resisting devices comprise water-hammer-resisting sliding pieces and compression springs, the water-hammer-resisting sliding pieces are arranged in the sliding holes, one ends of the compression springs act on the bottom of the valve rod, and the other ends of the compression springs act on the top of the water-hammer-resisting sliding pieces; and the compression springs have the pre-compression amount, and the water-hammer-resisting sliding pieces are close to the water inlet holes all the time. The stop valve has the water-hammer-resisting function.