Device for safely fixing truck shed cloth

The utility model provides a device for safely fixing truck shed cloth. The device comprises a support (6), a platform (5) arranged on the support (6) and a stair (3) arranged on the support (6) and connected with the platform (5). A stair (3) is connected to the support (6), and a platform (5) is connected to the top end of the stair (3); rams (2) are arranged at the top end of the bracket (6), are respectively arranged on two sides of the bracket (6) and are parallel to the bottom surface of the bracket (6); the rams (2) are parallel to each other; a sliding rod (1) is arranged at the upper end of the support (6), the two ends of the sliding rod (1) are fixed to the ram (2) respectively, and the sliding rod (1) is hung below the ram (2). During operation, a vehicle is parked at a designated position, an operator can carry out operation after hanging a safety belt from a stair to a vehicle roof, the operator can be effectively prevented from falling from high altitude, safety accidents are prevented, and the