The invention relates to the field of smoke box packaging, in particular to a cover feeding device of a chip packaging machine. The cover feeding device comprises a machine base and a feeding box arranged on the machine base. The feeding box comprises a shell, an opening formed in the top of the shell, a guide rod, springs and a layer board, wherein the guide rod and the springs are vertically arranged at the bottom of the shell, the layer board is arranged at the upper end of the guide rod and the upper ends of the springs, the guide rod penetrates the bottom of the shell, and at least one ratchet is arranged in the axial direction of the guide rod. A pawl engaged with the ratchets is arranged at the bottom of the shell. The pawl is provided with a rotating handle. After the guide rod is pulled downwards, the pawl is rotated through the rotating handle to lock the guide rod. A cover can be placed on the layer board, the pawl is loosened, the layer board automatically ascends through elasticity of the springs, and during later feeding, the cover can be directly drawn out of a box. The cover feeding device is simple and reasonable in design and simple, and cover feeding and managing are facilitated.