Anti-collision structure for security door

The utility model discloses an anti-collision structure for an anti-theft door, and belongs to the technical field of anti-theft doors. Comprising a door body, a limiting block, a movable plate, a fixed column, a sliding plate, a compression spring and a groove; a groove is formed in the door body, the fixing column is located in the groove, and the fixing column is fixedly connected with the door body; the sliding plate sleeves the fixed column, and the sliding plate is arranged in a sliding manner relative to the fixed column; the compression spring is located in the groove and arranged on the fixing column in a sleeving mode. A limiting block is arranged in the groove and is fixedly connected with the door body; a movable plate is arranged in the groove, and the movable plate is fixedly connected with the sliding plate; buffering structures such as the sliding plate, the compression spring and the air bag are arranged in the door body to buffer collision, and the problem that an existing door body is not p