The invention discloses a volute noise reducing stop valve. The volute noise reducing stop valve comprises a valve body, a valve deck and a valve rod. The valve body is provided with an inlet end used for inputting fluid, a volute-shaped flow channel is formed in the valve body, a middle end and an outlet end opposite to the middle end are further arranged in the valve body, the middle end and the outlet end are perpendicular to the inlet end and are communicated with the flow channel, the dimension of the cross section of the middle end is larger than that of the cross section of the outlet end, a valve base is arranged at the position, close to the outlet end, in the valve body, the valve deck is connected to the middle end, an operation component is arranged at one end of the valve rod, the other end of the valve rod penetrates into the valve body from the valve deck and is provided with a valve element, and when the operation component is operated, the valve element can plug the valve base to cut off fluid or be away from the valve base to make the fluid flow out of the outlet end. The volute noise reducing stop valve can relieve the vibrating and noise issues of an existing stop valve.