This is a kind of vein blood collection hemostatic paste that helps people to press accurately. The pressure positions and areas of the two puncture points on the skin and blood vessels after puncture are marked on the surface, and the correct pressure duration is reminded by the fading of the surface. Assist people to press the two different puncture points on the skin and blood vessels more accurately, so as to prevent problems such as congestion, swelling and pain caused by inaccurate pressing position and short pressing time after blood drawing. Help people stop the bleeding in right way.