The invention discloses a falling protector of a safety belt and belongs to the technical field of falling protectors of safety belts. The falling protector of the safety belt is characterized in that the falling protector comprises a left pincers plate, a right pincers plate, a connecting plate, a sliding clamping plate and a spring, wherein the left pincers plate and the right pincers plate are symmetric. The upper end of the left pincers plate and the upper end of the right pincers plate are respectively connected with a steel wire rope hook of the safety belt, the middle of the left pincers plate and the middle of the right pincers plate are respectively hinged to the connecting plate, and the spring is arranged between the upper end portion of the left pincers plate and the upper end portion of the right pincers plate; symmetric vertical edges are arranged at the right side of the upper portion of the left pincers plate and at the left side of the upper portion of the right pincers plate and a jaw capable of being opened and closed is formed by the lower end of the left pincers plate and the lower end of the right pincers plate; the sliding clamping plate is arranged between the left pincers plate and the right pincers plate, sliding guide rails are arranged between the sliding clamping plate and the vertical edges, and vertical limiting structures of the sliding clamping plate are arranged on the left pincers plate and the right pincers plate. The falling protector of the safety belt is simple in structure, low in weight and easy to carry; the falling protector can be separated from a shackle bolt when being pulling from the upper side and can be firmly connected with the shackle bolt when being pulling from the lower side so that the safety of a maintainer can be guaranteed and the labor efficiency can be improved.