The user can adjust the temperature of the mixed water of the hot and cold water according to the needs. The required temperature can be quickly reached and stabilized to ensure that the temperature of the water is constant, and is not affected by changes in water temperature, flow rate and water pressure, and solves the problem that the water temperature in the bath center is hot and cold. The problem is that when the cold water is interrupted, the mixing valve can automatically turn off the hot water within a few seconds to provide safety protection. The utility model relates to a temperature regulating mixing water valve, which comprises a valve body with a hot water inlet, a cold water inlet and a mixed water outlet, a valve core is arranged at the intersection of the central part of the valve body, and a handle is fixed on the valve stem of the valve core. An adjusting screw is arranged on the valve body outside the core, the adjusting screw is connected to the rotating body of the valve core through the valve body, and a flow regulating device is arranged at the water inlet, and the flow regulating device is provided with a pipe joint connected with the water inlet, A piston is arranged in the pipe joint, and the adjusting body is slidably disposed on the piston, and a flow regulating hole is opened in the wall of the adjusting body, and a compression spring is arranged between the adjusting body and the outer edge of the piston. When the water temperature is adjusted, the rotating body of the valve core is fixed by adjusting the screw, so that the water temperature does not change due to misoperation, and there is no need to re-adjust the next time, and the flow regulating device is also installed at the water inlet to ensure that the flow regulating device is installed. The water intake is constant, thus keeping the water temperature constant.