The invention discloses a polymer suspension emulsion for fracturing fluid. The polymer suspension emulsion comprises the following components in parts by weight: 350-450 parts of mineral oil, 16-20 parts of a suspending agent, 350-550 parts of polymer powder, 70-80 parts of inorganic potassium salt, 75-100 parts of alkyl ether ammonium sulfate, 35-60 parts of a demulsifying agent and 10 parts ofa wetting agent. The preparation method of the suspension emulsion comprises the following steps: (1) adding mineral oil into a production kettle, and starting stirring at the stirring frequency of 25Hz; (2) sequentially adding the suspending agent, the polymer powder and the sylvite into a production kettle; (3) adjusting the stirring frequency to 35Hz, opening a circulating valve of the production kettle, starting a primary circulating pump, and circularly stirring the materials for 30min; and (4) adding alkyl ether ammonium sulfate, the demulsifying agent and the wetting agent, closing theprimary circulating pump, starting the secondary circulating pump, and continuously and circularly stirring for 30 minutes to obtain the polymer suspension emulsion for the fracturing fluid. The suspension emulsion prepared by the invention has the advantages of rapid dissolution, good salt resistance, good stability and low cost, and meets the technical requirements of continuous blending large-displacement hydraulic fracturing construction.