The invention relates to a continuous powder feeding device and a real-time control method. A hopper of the continuous powder feeding device is installed on a weighing platform of a scale located on a bracket, the upper end of a blanking valve is communicated with a discharge hole of the hopper, the lower end of the blanking valve is communicated with the upper end of a rubber tube valve, the lower end of the rubber tube valve is communicated with a blanking pipe, and two air hammers are installed on upper and lower portions of an outer wall of the blanking pipe respectively. During feeding, the initial feeding amount is weighed, the weight of the feeding device is weighed before and after connection with a mixture pot so as to control the feeding amount, and opening of the blanking valve and a switch of a vibrator are adjusted, so that feeding speed control is achieved. According to the continuous powder feeding device and the real-time control method, continuous and smooth feeding of large-weight and small particle size powder in large vertical mixers can be achieved, feeding speeds and feeding amount can be controlled, product qualities are improved, and safety of a feeding process is guaranteed.