The invention discloses an emulsion suitable for a high-viscosity oil product; the emulsion comprises a agent A and an agent B, wherein the agent A comprises the following materials in parts by weight: 25-35 parts of base oil and 8-15 parts of a hydrocarbon solvent; the agent B comprises the following materials in parts by weight: 8-18 parts of a double-chain ionic surfactant, 2-8 parts of sodium petroleum sulfonate, 0.1-3 parts of fatty alcohol polyoxyethylene ether, 0.1-2 parts of sodium cetyl alcohol sulfate, 0.2-2 parts of a cosurfactant, 8-12 parts of an oil soluble assistant, 2-8 parts of sulfonated caster oil, 3-6 parts of an electrolyte, and 45-65 parts of water. The emulsion of the invention has excellent emulsification viscosity break capacity, has a micro emulsion structure, can significantly reduce the viscosity of the oil product by two orders of magnitude or more, and can retain for a long period of time at high mineral concentration. The emulsion has high over-all properties. The process is simple, and the energy consumption is low.