An external fixation device for body includes a front part and a back part and can be shaped according to the shape of human body. The front part includes a cavity, two layers of knitting cloth, and elastic belts. The back part includes a cavity, two layers of knitting cloth, and plackets. The lower end edge of the front part and the lower end edge of the back part are respectively provided with a filling port and the filling ports are both sewed with a hook and loop. An outer side of one of the elastic belts of the front part and an inner side of one of the plackets of the back part are respectively provided with a piece of a first fastener. An armhole width part of the front part and an armhole width part of the back part are respectively provided with a piece of a second fastener.
