The invention provides a radial artery hemostat, comprising: a compression portion, a wristband and a control box; the compression portion includes a compress plate and a square balloon and is used for compressing an incision part; the wristband includes an outer sandwich layer and a balloon tape arranged in the outer sandwich layer and is used for fixing the compression portion to the incision part; the control box includes a first adjusting portion and a second adjusting portion, the first adjusting portion controls the balloon tape for inflating or deflating, and the second adjusting portion controls the square balloon for inflating or deflating. The radial artery hemostat has the advantages that the compress plate can be primarily adjusted, and the radial artery hemostat is accurate to align and convenient to wear; compressive force for an incision can be precisely adjusted by the compression portion according to the gesture of a wrist, and automatic adjustment of the compressive force during wearing is achieved; the compressive force for the incision by the compression portion is adjusted according to bleeding area, so that the compressive force for the incision is further precisely adjusted.