The invention discloses an intelligent mixing head injection system, and relates to the field of refrigerator manufacturing. The intelligent mixing head injection system includes a control chip and aninjection action unit; the control chip includes a database module for inputting foaming process parameters of different types of door bodies, a modeling module for establishing a mathematical modelfrom injection parameters corresponding to different sizes of door bodies through a grey-box principle, and a calculation module for matching a corresponding mathematical model according to the user-inputted length, width and height of a door body to be foamed, calculating corresponding injection parameters and outputting parameter signals to the injection action unit. By inputting the length, width and height of the door body to be foamed and the flow rate of a mixing head, or inputting the length, width and height of the door body to be foamed and the moving speed of the mixing head, and through the inputted process parameter module in advance through matching, a calculation result is fed back to the injection action module, the injection action is automatically completed by the system,the degree of automation of the system is improved, materials are saved, and the production costs are reduced.