The utility model relates to the technical field of LED projection lamps, and discloses an LED projection lamp control device which comprises an LED module, a fixing frame, a connecting plate, a heat dissipation table, a supporting frame, a rotating roller and a control
assembly, the control
assembly takes a
servo motor as a power source, and the motor drives a driving gear to rotate. The driving gear is meshed with a plurality of connecting gears, then the connecting gears are matched with tooth grooves in the inner wall of the rotary drum, power is transmitted to the rotary drum, the
diameter ratio of the driving gear to the rotary drum is 1: 3, the planetary gear structure is excellent in
motor torque lifting performance, stable rotation can be ensured when a heavy LED module, a heat dissipation table and other structures are driven, and the service life of the motor is prolonged. And the
rotating drum rotates to drive the rotating roller through the connecting disc and the connecting rod, so that the connecting plate and the LED module rotate, and the angle of the projection lamp is controlled. By means of the structural design, accurate
transmission ratio control can be achieved, the rotation angle of the LED module can be accurately adjusted, and the requirement for accurate angle control in the modern illumination field is met.