The invention provides automatic milk powder preparing equipment. A shell is cylindrical, and the top of the shell is provided with a display screen and a rotary knob; a water supply cavity, milk powder cavities and a stirring cavity are formed in the shell; a boiling water cavity is formed in the upper half portion of the water supply cavity, and a warm water cavity is formed in the lower half portion of the water supply cavity; each milk powder cavity comprises a quantitative supplying device; the stirring cavity is connected with the warm water cavity through a second electromagnetic valve and connected with discharging openings of the quantitative supplying devices through third electromagnetic valves, an electric motor is arranged at the top of the stirring cavity, an output shaft of the electric motor is connected with a stirring paddle through a coupling, the bottom of the stirring cavity is connected to a milk outlet in the shell through a fourth electromagnetic valve, a first heating rod is connected to an alternating current power source, a second heating rod is connected to the output end of an electric power conversion circuit, and the input end of the electric power conversion circuit is connected to the alternating current power source.