Novel powder unpacking and feeding device

The utility model relates to the technical field of automatic unpacking equipment, and discloses a novel powder unpacking and feeding device which comprises a dustproof bin, an unpacking device, a bag moving device and a waste bag collecting bin. The upper side of the dustproof bin communicates with the upper side of the waste bag collecting bin, the unpacking device is arranged in the dustproof bin, and the bag moving device is arranged at the communicating position of the dustproof bin and the waste bag collecting bin. When powder needs to be unpacked, the bagged powder is conveyed into the dustproof bin through the external conveying belt, and the powder bag is scratched by the unpacking device located in the dustproof bin; at the moment, the powder in the powder bag begins to fall onto the screen to be screened; then the bag moving device enables the bag to do up-and-down linear motion for multiple times, and powder in the powder bag is rapidly leaked; and then, the bag moving device conveys the powder em