Powder coating suitable for being sprayed on surface of automobile body and preparation method of powder coating

The invention discloses a powder coating suitable for being sprayed on the surface of an automobile body. Comprising the following components in parts by weight: 60 to 70 parts of fluorine-containing polyester resin, 3 to 8 parts of triglycidyl isocyanurate, 1 to 3 parts of polyacrylate, 1 to 5 parts of pigment, 19 to 23 parts of silane modified filler, 0.4 to 0.6 part of benzotriazole ultraviolet light absorber, 0.1 to 0.3 part of hindered phenol antioxidant, 0.2 to 0.4 part of phosphite antioxidant and 0.5 to 1.5 parts of blocked polyisocyanate. The invention also discloses a preparation method of the powder coating, which comprises the following steps: putting the raw materials into a stirring pot, uniformly stirring, melting and extruding by an extruder, tabletting and crushing by a tabletting machine, and crushing into powder particles with the mesh number of less than or equal to 180 meshes by a screening machine to prepare the powder coating. The hardness and flexibility of a coating formed after the p