The utility model discloses a cardiovascular post -operation tourniquet capable of conveniently exchanging hemostasis patch, apply including stanchhing and to take the body, to stanch to apply and to take both ends adhesion fixing device, stanch to apply and take convertible length bandage, it takes the body end to be provided with to stanch to apply stanch to apply and take both ends adhesion fixing device, stanch apply take the body with stanch to apply to take and be connected with between the both ends adhesion fixing device stanch to apply and take convertible length bandage, stanch to apply to take to be provided with to stanch to apply in the middle of the convertible length bandage and take central gauze opening pouch, stop blooding to apply and take the inside built -in supplementary medicine bag of opening pouch of having placed of central gauze opening pouch, stanch to apply and take the inside built -in multilayer gauze layer of medicine bag that is provided with of central gauze opening pouch. The utility model discloses simple structure, reasonable in design can change the hemostasis piece at any time to the hemostasis and the protection that more are fit for the postsurgical are handled.