A freely connected triple-branched parallel orthopedic external fixation stent, consisting of two fixing rings (1, 2) and three branches (3, 4, 5). The fixing rings (1, 2) are provided with connecting holes uniformly distributed in a circumferential direction. The branches (3, 4, 5) are provided with two driving movement pairs (101, 103), one rotation pair (102/702), and one ball pair (104/701). The two fixing rings (1, 2) can be fixedly connected to bone blocks (901, 902) at both ends of a fracture via metal bone pins. The driving movement pairs (101, 103) of the branches (3, 4, 5) can be adjusted according to a specific rule to generate relative six degrees of freedom (R1, R2, R3, R4, P1, P2) movement between the fixing rings (1, 2) to achieve reduction of the fracture. The three branches of the freely connected triple-branched parallel orthopedic external fixation stent can be freely connected between the fixing rings (1, 2), achieving convenient and quick installation. The number of branches (3, 4, 5) is less than that of conventional parallel external fixation stents, such that the stent is comparatively lighter and causes little interference to fluoroscopic images. The driving movement pairs (101, 103) of the branches (3, 4, 5) can accurately indicate driving displacement and can be locked, such that reduction and fixation of fractures is more precise. The freely connected triple-branched parallel orthopedic external fixation stent is of great significance in improving clinical application efficacy of orthopedic external fixation technology.L'invention concerne un stent de fixation externe orthopédique parallèle à trois branches relié librement, constitué de deux anneaux de fixation (1, 2) et trois branches (3, 4, 5). Les anneaux de fixation (1, 2) sont pourvus de trous de liaison répartis uniformément dans une direction circonférentielle. Les branches (3, 4, 5) sont pourvues de deux paires de mouvements d'entraînement (101, 103), d'une paire de rotation (102/
