Automatic auxiliary material feeding device

The utility model relates to the technical field of auxiliary material feeding equipment, in particular to an automatic auxiliary material feeding device which comprises a backing material box and a feeding unit. The feeding unit comprises a storage box, a discharging structure and a control structure; the discharging structures are communicated with the storage box, the number of the discharging structures is multiple, and each discharging structure comprises a second discharging pipe used for conveying auxiliary materials into the backing material box; the control structure comprises a sliding groove block, a connecting plate and a discharging control plate. A discharging hole used for being communicated with the second discharging pipe is formed in the discharging control plate, the discharging control plate is in sliding connection with a sliding groove block through a connecting plate, and the sliding groove block is fixed to the material storage box. According to the scheme, the technical problem that t