Novel folding racking platform of telescopic derrick of petroleum drilling machine

The utility model relates to a novel folding racking platform of a telescopic derrick of a petroleum drilling machine, which comprises a fixed pulley assembly, a suspension rope, a racking platform, a turnover handrail, a guide pulley assembly, a traveling pulley assembly, a lower guide rail, an upper guide rail, the fixed seats of the guide rails and a stop block, wherein the fixed pulley assembly, the guide pulley assembly and the racking platform are fixed on an upper section of the derrick, and the turnover handrail is connected with the racking platform; the lower guide rail and the upper guide rail are fixed on a lower section of the derrick by using the fixed seats of the guide rails; the traveling pulley assembly is positioned between the lower guide rail and the upper guide rail, and the stop block is positioned at the ends of the lower guide rail and the upper guide rail and restricts the travel of the traveling pulley assembly; and one end of the suspension rope is fixed on the turnover handrail, a