The utility model provides a quick medicine charging device. A medicine hopper, a cylinder, a belt conveyer and a motor in the medicine charging device are sequentially installed on a frame; an electronic scale is arranged below a discharge end of the belt conveyer on one side of the frame; the cylinder and a brush are installed above the belt conveyer; the motor is connected with the belt conveyer through a motor shaft; the cylinder is connected with the brush through a cylinder rod; and the control system is respectively connected with the motor, the electronic scale and the cylinder. The medicine in the medicine hopper is added into a medicine cup on the electronic scale through the belt conveyer; in the conveying process, the cylinder drives the brush to enable the medicine on the belt to be uniformly distributed on the belt; the medicine charging is completed according to a certain weight value; the data feedback of the motor and the electronic scale is controlled to control the motor speed and the cylinder; thus, the medicine can be charged quickly or slowly, and the charging speed is convenient to adjust; and the utility model can well satisfy the medicine charging requirements of large medicine particle, large addition amount, fast pace and low noise.