Weight-loss feeding device and feeding method for continuous feeding of powdery raw materials

The invention relates to a weight-loss feeding device and a feeding method for continuous and accurate feeding of powdery raw materials of energetic materials. The device comprises main body parts of a main feeder and an auxiliary feeder, a support, a control system and another material supplementing device, wherein each of the main body parts of the main feeder and the auxiliary feeder comprises a material bin, a feeder body and a weighing sensor; the main body part of the auxiliary feeder is mounted on the support ; a material outlet of another material supplementing device is in flexible connection with a feeding port of the material bin of the auxiliary feeder, and a material outlet of the feeder body of the auxiliary feeder is in flexible connection with a feeding port of the material bin of the main feeder; the control system is connected with the main feeder and the auxiliary feeder through control circuits and used for controlling accurate feeding and material supplementing of the main feeder and the