Method for preparing fluorine-containing polymer through dispersion method

The invention relates to a method for preparing a fluorine-containing polymer through a dispersion method, and the method comprises the following step of: carrying out homopolymerization reaction or copolymerization reaction by adopting at least one fluorine-containing alkene monomer, or carrying out copolymerization reaction of at least one fluorine-containing alkene monomer and at least one fluorine-free alkene monomer under the action of an initiating agent at the reaction temperature of 5-150 DEG C and the reaction pressure of 1-10 MPa for the reaction time of 0.1-50 hours, wherein the weight percentage content of a fluorine-containing surface active agent in a reaction medium is 0.001%-10% in a polymerization process. The method provided by the invention can be used for preparing the fluorine-containing polymer without adopting perfluoro caprylic acid and a derivative thereof as dispersing agents, has the advantages of easiness for operation, high safety and easiness for polymerization condition control, prevents the perfluoro caprylic acid and the derivative thereof from being adopted as the dispersing agents and prevents the pollution of the perfluoro caprylic acid and the ramification thereof on the environment.