The invention discloses a material compaction device for food packaging. The material compaction device comprises a base, a support column, a transverse plate, a lifting device, a mounting plate, a vertical plate, a rotating shaft, a threaded part, a threaded sleeve, a first hinged seat, a first connecting rod, a second hinged seat, a pressing plate, support blocks, a guide block, a guide hole anda guide rod, wherein two driven bevel gears are symmetrically installed on the rotating shaft and are located between the two support blocks along the center, the two driven bevel gears are oppositely arranged, and a semicircular bevel gear is engaged with the upper ends of the two driven bevel gears. According to the material compaction device, the directions are opposite when the two driven bevel gears are respectively engaged with the semicircular bevel gear to move, so that the back-and-forth rotation of the rotating shaft can be realized, the up-and-down reciprocating movement of the pressing plate is realized, and continuous reciprocating downward pressing is realized; when pressure is applied to a bearing plate, a clamping plate is close to the center of the upper end of the bearing plate so as to clamp a material tank body on the bearing plate, when the pressure applied to the bearing plate disappears, the bearing plate and the clamping plate are automatically reset, and manual adjustment is not needed.