Powder filling device and powder filling method

The powder filling device and the powder filling method are used for filling a preset amount of powder into a powder bin of a product, a powder filling opening is formed in the upper portion of the powder bin, the powder filling device comprises a conveying mechanism, an assembling mechanism, a powder filling mechanism and a vibrating mechanism, and the conveying mechanism is used for conveying the product and comprises a carrier used for bearing the product; the assembling mechanism is used for covering the carrier with the cover body and enabling the carrier and the cover body to be mutually fixed, the cover body is provided with a containing cavity capable of storing the powder, a powder outlet communicated with the containing cavity is formed in the lower portion of the cover body, and when the carrier is covered with the cover body, the powder outlet is located above the powder filling opening and corresponds to the powder filling opening in position; the powder outlet is communicated with the powder fil