A water flow rate automatic control module, comprising a base, a valve body, a thermosensitive assembly and a diaphragm; wherein the base is hermetically connected with a lower end of the valve body, a cold water cavity of the water flow rate automatic control module is enclosed between the base and the valve body, and a side wall of the valve body is provided with a cold water passing hole of the water flow rate automatic control module communicating with the cold water cavity; wherein an upper end of the valve body is hermetically connected with an end cover of the water flow rate automatic control module, a warm water cavity of the water flow rate automatic control module is enclosed between the end cover and the valve body, and a supporting tube of the water flow rate automatic control module coaxially and fixedly connecting with the valve body is arranged in the warm water cavity; wherein a side wall of an upper section of the valve body is provided with a warm water inlet hole, a side wall of a middle of the valve body is provided with a warm water outlet hole, a side water passage of the water flow rate automatic control module communicating with the warm water inlet hole and a warm water outlet hole are arranged between an inner wall of the valve body and the supporting tube; and wherein a middle part of the thermosensitive assembly is detachably and hermetically connected with the valve body; characterized in that the thermosensitive assembly comprises a temperature sensing part and a moving rod stretching or contracting in the temperature sensing part is inserted into the temperature sensing part; wherein the temperature sensing part is arranged in the cold water cavity, a free end of the moving rod is fixedly connected with a diaphragm support of the water flow rate automatic control module, the diaphragm support is arranged in the warm water cavity and is arranged above the supporting tube, a buckle cover of the water flow rate automatic control module is detachably connected to the diaphragm support, and the diaphragm is arranged between the diaphragm support and the buckle cover; and wherein a return spring of the water flow rate automatic control module enabling the diaphragm to be in close contact with the upper end of the supporting tube is arranged between the buckle cover and the end cover. wherein the base is hermetically connected with a lower end of the valve body, a cold water cavity of the water flow rate automatic control module is enclosed between the base and the valve body, and a side wall of the valve body is provided with a cold water passing hole of the water flow rate automatic control module communicating with the cold water cavity; wherein an upper end of the valve body is hermetically connected with an end cover of the water flow rate automatic control module, a warm water cavity of the water flow rate automatic control module is enclosed between the end cover and the valve body, and a supporting tube of the water flow rate automatic control module coaxially and fixedly connecting with the valve body is arranged in the warm water cavity; wherein a side wall of an upper section of the valve body is provided with a warm water inlet hole, a side wall of a middle of the valve body is provided with a warm water outlet hole, a side water passage of the water flow rate automatic control module communicating with the warm water inlet hole and a warm water outlet hole are arranged between an inner wall of the valve body and the supporting tube; and wherein a middle part of the thermosensitive assembly is detachably and hermetically connected with the valve body; characterized in that the thermosensitive assembly comprises a temperature sensing part and a moving rod stretching or contracting in the temperature sensing part is inserted into the temperature sensing part; wherein the temperature sensing part is arranged in the cold water cavity, a free end of the moving rod is fixedly connected with a diaphragm support of the water flow rate automatic control module, the diaphragm support is arranged in the warm water cavity and is arranged above the supporting tube, a buckle cover of the water flow rate automatic control module is detachably connected to the diaphragm support, and the diaphragm is arranged between the diaphragm support and the buckle cover; and wherein a return spring of the water flow rate automatic control module enabling the diaphragm to be in close contact with the upper end of the supporting tube is arranged between the buckle cover and the end cover.