A compression hemostasis device includes: a substrate body (100) a strap (200), two ends of which are connected respectively to two ends of the substrate body (100) to form a ring a compression mechanism (300) arranged on the inner side of the substrate body (100) towards the strap (200) and comprising a compression cavity and a compression member which movably seals the compression cavity by means of a movable member and is provided with a transparent lens (301) at a compression end facing the strap (200) the substrate body (100) being at least partially transparent so as to form the transparent light path passing through the substrate body (100) from the transparent lens (301) and a regulating mechanism (400) comprising a regulating cavity and a regulating member. The regulating cavity is communicated with the compression cavity and the regulating member movably seals the regulating cavity by means of a movable body. The volume of the regulating cavity is changed by means of the movement of the regulating member and the pressure transmitted from the compression cavity to the compression member is consequently changed. The device is provided with a structure having a transparent light path, so that the bleeding condition can be observed more clearly and bleeding can be stopped more effectively by means of compression according to patients condition.Un dispositif dhémostase par compression comprend : un corps de substrat (100) une sangle (200), dont deux extrémités sont reliées respectivement à deux extrémités du corps de substrat (100) pour former un anneau un mécanisme de compression (300) agencé sur le côté interne du corps de substrat (100) vers la sangle (200) et comprenant une cavité de compression et un élément de compression qui assure létanchéité de façon amovible de la cavité de compression au moyen dun élément amovible et est pourvu dune lentille transparente (301) au niveau dune extrémité de compression opposée à la sangle (200) le corps de substrat (100
