The invention discloses an air bag and staggered elastic plate mixed hemostatic structure and a hemostatic device, wherein the hemostatic structure consists of a hemostatic material external application film and a mixed self-adaptive structure. The mixed self-adaptive structure consists of an air bag, an inflation device and an adaptive elastic plate unfolding structure. The upper end of the air bag is hermetically connected with the inflation device, and the inflation device can control the gas pressure in the air bag according to the blood pressure. The self-adaptive elastic plate unfoldingstructure consists of elastic plates and a supporting rod. The elastic plates are fixed on the supporting rod, the elastic plates of each layer are arranged according to a certain angle difference theta, and the geometrical linearity of the elastic plate is an evolvent, the hemostatic material external application film is adhered and fixed on the outer side of the air bag. When in use, the mixed hemostatic structure is injected into a wound, the inflation device is opened to inflate the air bag so as to drive the hemostatic material external application film to contact with the wound surface,the elastic plate releases elastic potential energy and expand radially to provide support for the air bag, when the pressure meets the pressing hemostatic condition of the wound, the inflation is stopped, so that the hemostatic function is achieved.