Abstract: Provided is a tourniquet device including a belt body and a timer, wherein the timer includes: a housing having a plurality of bulges; a connecting component arranged on the outside of the housing to connect the belt body to the timer; and a timing unit and a warning unit, which are arranged inside the housing, wherein the belt body is clamped between the bulges and the connecting component. In the tourniquet device, the timer is small, simple to operate, and not easy to fall off from the belt body. In addition, the tourniquet device is suitable for users' conventional operation without undue difficulties in use.