Organic fluorine-silicon surface treatment agent and preparation method thereof

The invention discloses an organic fluorine-silicon surface treatment agent and a preparation method thereof. According to the organic fluorine-silicon surface treatment agent, amino silane coupling agents, amino-polysiloxane and epoxy polysiloxane serve as basic reactants, hexafluoropropene trimer serves as a modifying agent, glycol dimethyl ether serves as solvent, triethylamine serves as a catalyst, and the organic fluorine-silicon surface treatment agent is a fluorine-silicon oxidane compound synthesized through a reaction or a fluorine-silicon oxidane polymer with a perfluoroalkyl group introduced to a side chain. According to the organic fluorine-silicon surface treatment agent and the preparation method thereof, it is not needed to generate a reaction intermediate through a link chain structure in the first place, the synthesis route is simple, the conversion rate is high, and the prepared organic fluorine-silicon compound has high surface activity and high stability and can be used for water resistance, oil resistance and stain repellent finishing of fiber fabric as well as waterproof and stain repellent treatment of metal and building materials.