Waste sand loading device

The utility model relates to a waste sand loading device for a large ship cabin after sand blasting and rust removing, comprising a fixed frame body (2) and a waste sand hopper (1) which is lifted inthe fixed frame body (2); the bottom part of the waste sand hopper (1) is provided with a sliding door (3), and the bottom part of the sliding door (3) is provided with ear climbing devices (4); the two sides of the fixed frame body (2) are provided with guide wheels (7), and the inner part thereof is provided with a transmission device; the transmission device comprises a track (11), a motor (8),lead screw nuts (9), transmission shifting forks (5), groove wheels (10) and the track (11), wherein the lead screw nuts (9) have two groups, and are arranged above the track (11) in a manner that one is arranged at left and the other is arranged at right; the transmission shifting forks (5) also have two pieces and are respectively arranged at the inner ends of the two groups of lead screw nuts(9); the ear climbing devic