The present invention pertains to the field of firefighting equipment, concretely relates to an automatic foam proportional mixing digital display controlling module and consists of microcomputer control unit, sensor unit and driver unit. The microcomputer control unit consists of circuit board component, electric signal connector, display and operating mechanism, and housing. They are overlapped in the housing. The circuit board component consists of microprocessor, electric signal input interface, electric signal output interface and digital communication interface. The electric signal connector and the display and operating mechanism are inside the housing; the sensor unit includes water flowmeter, foam flowmeter, and one or several types of level sensor or pressure sensor; the driver unit includes one or several types of DC brushless motor driver and electric valve driver; the electric signal input interface, electric signal output interface and digital communication interface of the electric circuit component are connected to the sensing component of the sensor unit and the driving component of the driver unit with electric signal connector. The present invention may greatly raise the automation degree of proportional foam mixing, and realize accurate control and adjustment of less than 1% mixing proportion.