The invention discloses an adsorption assembly for a front fly hole locking device. The adsorption assembly for a front fly hole locking device is characterized by comprising a base, an adsorption plate, a frame plate, an upper cover plate, a connecting pipe, a connecting assembly, an air cylinder and a reset assembly; the integral base is a U-shaped plate with a downward opening; the frame plate is provided with an airflow channel runs through the frame plate; the frame plate is hinged to the base through the connecting assembly; the frame plate is driven by an air cylinder to rotate downward; the reset assembly is arranged between the frame plate and the base and the frame plate is driven to rotate upward by the reset assembly; the adsorption plate is connected to and fixed on the lower side of the frame plate in a closed mode; the upper cover plate is connected to and fixed on the upper side of the frame plate in a closed mode from top to bottom; the adsorption plate is provided with an induced draft hole group and a communication hole; the induced draft hole group is provided with a plurality of induced draft holes which are distributed in a matrix mode; the induced draft holes are communicated with an air inlet portion of the airflow channel. The adsorption assembly for a front fly hole locking device has the advantages of being large in adsorption force and large in adsorption covering area and thoroughly solving the problem that thin materials and soft materials are easy to generate displacement during the feeding process.