Auto-compression garbage can for milk boxes

The invention discloses an auto-compression garbage can for milk boxes. The auto-compression garbage can for the milk boxes comprises a garbage can shell, a compression unit and a drive unit, wherein a garbage pouring port is formed in an upper part of the garbage can shell, and an induction switch is installed at the garbage pouring port; the compression unit comprises a slide groove, a baffle and a press plate, the top end of the slide groove is level with the lower edge of the garbage pouring port, the baffle is arranged above the bottom end of the slide groove, the press plate is arranged above the slide groove, and the press plate is located between the garbage pouring port and the baffle; when one milk box enters the garbage can shell through the garbage pouring port, the induction switch induces and enables a control motor to positively rotate, and downward movement of the compression unit is driven through downward movement of a screw nut, for extruding the milk box; and the extruded milk box penetrat