The invention discloses a detection method for a protamine sulfate paracoagulation experiment. The detection method comprises the following steps of taking to-be-detected blood plasma; adding a protamine sulfate solution with the concentration of 0.005 g/ml; and if a fibrin clot forms and the intensity of scattered light of a sample gradually increases in a reaction system, using an instrument to describe the optical change as a coagulation curve, and recording the coagulation time (T) and the curve lifting height (dH) at the same time after the sample is completely coagulated and the intensity of the scattered light is stabilized. The method has the advantages that disseminated intravascular coagulation can be accurately and effectively screened, the cost is very low, the method is suitable for clinical batch screening, and the application prospect is very good.