The utility model discloses a 750kV power station handrail board one shot forming device. The device is including last mould (1) to and press (3) that link to each other with last mould (1) top, lower mould (2), on frock board (5) are fixed in through fixed column (4) with the welded mode in lower mould (2), the intermediate position of going up mould (1) bottom has a protruding tongue down, the intermediate position at lower mould (2) top has a recessed recess, it coordinates each other to go up the tongue of mould (1) bottom and the recess at lower mould (2) top. Through adopting the utility model discloses the technique, can be smooth once suppress the handrail fixed plate into, improved work efficiency and product quality, handrail fixed plate homoenergetic and the pavement owner material produced are connected smoothly.