The invention discloses automatic control equipment for a rotary cutter for wood, and relates to the field of control technologies for rotary cutters. The automatic control equipment comprises a lead screw motor, a single-roll motor, a double-roll motor, an alternating-current contactor, a frequency converter, a controller, a speed sensor, a proximity switch, an RS485 communication module and a display and input module. A lead screw can move under the control of the lead screw motor, a single roll can move under the control of the single-roll motor, double rolls can move under the control of the double-roll motor, the alternating-current contactor is connected with the single-roll motor and the double-roll motor, and the frequency converter is connected with the alternating-current contactor; the controller is used for analyzing and processing data, the speed sensor is connected with the controller and is used for detecting the rotational speed of the lead screw motor, the proximity switch is connected with the controller and is used for recording the quantity of slabs in real time, the RS485 communication module is connected with the controller, the frequency converter can rotate clockwise and anticlockwise or can jog or stop under the control of the RS485 communication module in real time, and the display and input module is connected with the controller and is used for inputting and displaying the thicknesses and the lengths of the slabs; the proximity switch is mounted at the front end of the lead screw. The automatic control equipment has the advantages that the required machining thicknesses of veneers can be conveniently selected, and the automatic control equipment is simple in structure, convenient to operate and high in accuracy.