The utility model discloses an outdoor blind system of anti -wind type, a serial communication port, including the blade with set up in the motor on blade upper portion, the motor both ends are connected with the transmission shaft, be provided with a plurality of ropewinders on the transmission shaft, it has elevator belt and unilateral ladder rope to tie on the ropewinder, tie on the ropewinder upper end of elevator belt, elevator belt top -down pass in proper order set up in elevator belt drill way on the blade, the lower extreme of elevator belt fix set up in on the end rail of blade bottom, the upper end of unilateral ladder rope is fixed on the ropewinder, unilateral ladder rope top -down fixes in proper order on the steel hook of blade both sides. The utility model discloses effectively avoided elevator belt and blade incision department to take place the friction, the blade can overturn bigger angle makes the blade closure tighter. The blade both sides are fixed with steel hook for fixed unilateral ladder is restricted, and the connection of rigidity makes the blade have unilateral ladder rope to connect more fast.