A fixing device for a medical position-restraining belt, the fixing device being used to fix the medical position-restraining belt to the side rails (5) of an operating table, and to release the medical position-restraining belt from the side rails (5) of the operating table; the fixing device of the medical position-restraining belt comprises an upper clamping piece (1), a lower clamping piece (2) and an elastic piece (4); the upper clamping piece (1) or the lower clamping piece (2) is connected to the medical position-restraining belt; the upper clamping piece (1) and the lower clamping piece (2) are respectively provided with a clamping portion (11, 21) for clamping onto the side rails (5) of the operating table; two ends of the elastic piece (4) respectively press against or are respectively fixed to the upper clamping piece (1) and the lower clamping piece (2); the fixing device for the medical position-restraining belt can be in a clamping state and an open state; in the clamping state, the elastic piece (4) moves the clamping portion (11) of the upper clamping piece (1) and the clamping portion (21) of the lower clamping piece (2) to each other via the elastic force of the elastic piece (4), thus fixing the medical position-restraining belt to the side rails (5) of the operating table; and in the open state, the elastic force of the elastic piece (4) is overcome moving the clamping portion (11) of the upper clamping piece (1) and the clamping portion (21) of the lower clamping piece (2) away from each other, thus releasing the medical position-restraining belt from the side rails (5) of the operating table.La présente invention concerne un dispositif de fixation pour une sangle de restriction de position médicale, le dispositif de fixation étant utilisé pour fixer la sangle de restriction de position médicale aux rails latéraux (5) d'une table d'opération, et pour libérer la sangle de restriction de position médicale des rails latéraux (5) de la table d'opéra