The invention discloses a preparation method of general-purpose acrylate rubber by using butadiene as a polymerization monomer. The preparation of the extremely cold resistant rubber comprises the following operation steps: S1, selecting raw materials; S2, proportioning the raw materials; S3, preparing auxiliary agents; S4, performing pre-mixing; S5, performing emulsion polymerization; S6, performing demulsification on gel; S7, washing the demulsified gel; and S8, performing drying and performing packaging. The method provided by the invention has the following beneficial effects: a pre-emulsion is introduced in the emulsion polymerization process, and the butadiene is used as the cross-linking monomer; the preparation method of the general-purpose acrylate rubber simultaneously having better cold resistance, low-temperature performance and elongation is provided, and the problems of poorer cold resistance, low-temperature performance and elongation of a current product are solved; andthe butadiene is the main polymerization monomer in rubber and is cheap and easy to prepare, so that the production costs are reduced, the overall low-temperature performance and elongation of the product are improved, and the development of rubber production industry is promoted.