The invention relates to the technical field of steel and aluminum products, and discloses an auxiliary scrap collecting device of steel machining equipment. The auxiliary scrap collecting device comprises a shell, a collecting and compressing mechanism is arranged inside the shell, the collecting and compressing mechanism comprises a vibration assembly, a compressing assembly, a discharging assembly and a triggering assembly, the vibration assembly for collecting scraps is arranged inside the shell, the compressing assembly for compressing the size of the scraps is arranged inside the shell, the discharging assembly for discharging the compressed scraps is arranged outside the compression assembly, and a triggering assembly for triggering the compression assembly to operate is arranged inside the shell. A rotating ring rotates to drive a connecting column and the compression plate fixedly connected to the connecting column to move, a compression plate moves to compress the machining scraps, the effects that the steel machining scraps are compressed, recycling is convenient, and the storage space is saved can be achieved, the steel scraps can be further recycled, and meanwhile, the device better conforms to the technical concept of intelligent manufacturing.