The invention provides a method for separating polymers after emulsion polymerization. The method solves the problems of irregular particle form, poor flowing performance, wide granularity distribution and low pile density of resin powder mass particles, and also solves the problem of high cost of the existing process. The method comprises the following steps that in one reaction kettle, an emulsion formed after the polymerizion of an anionic emulsifier system is coagulated under the effect of a coagulating agent to generate polymer suspension liquid, wherein the coagulating agent is an acid coagulating agent, according to the coagulating reaction method, the emulsion is added into the coagulating agent with the pH being 3 to 4.5 and the temperature being 35 to 50; then, the temperature is raised to 80 to 90 DEG C in 25 to 35 min; next, heat insulation is performed for 10 to 15min; the polymer suspension is subjected to impurity removal and drying; resin powder is obtained.