The invention discloses a method for preparing a transparent VO2 heat color intelligent thin film through the electrospinning technique. The method includes the following steps that 1, VO2 powder is added into DMF to be dispersed for 1-6 h, PMMA is added, the materials are stirred for 6-48 h, and an electrospinning precursor solution is obtained; 2, a transparent material serves as a receiving substrate, the electrospinning precursor solution obtained in S1 is used for electrospinning, and a PMMA-VO2 composite nanofiber film is obtained; 3, the PMMA-VO2 composite nanofiber film obtained in S2 is subjected to heat treatment, and the transparent VO2 heat color intelligent thin film is obtained. The prepared composite nanofiber film is in a continuous fiber shape, VO2 is distributed in the axial direction of fibers and wrapped in the nano-fibers to be isolated from air, and the oxidation resistance of VO2 can be improved. The thin film is directly deposited on the substrate, and no secondary film pasting is needed. The equipment requirement is low, simpleness and effectiveness are achieved, the production cost is low, and large-scale production is easy to achieve. Preparation of the transparent thin film provides a new thought for application of the electrospinning technique in the optical field.