The invention relates to a coating-type light conversion film and a preparation method of the coating-type light conversion film. The invention belongs to the technical field of an agricultural film. An inner layer of the coating-type light conversion film is a mechanical property layer; a middle layer is a heat-insulating light conversion layer; a secondary outer layer is a coating carrier layer, and the outer layer is a film coating layer. The preparation method of the coating-type light conversion film comprises the following steps of: (1) preparing a multifunctional master batch with a long service life, heating an internal mixer, charging and agitating, discharging and pelletizing; (2) preparing the master batch with the long service life and efficient light conversion, heating the internal mixer, charging and agitating, discharging and pelletizing; (3) manufacturing the coating light conversion film, weighing the inner layer, the middle layer and the secondary outer layer according the prescription, respectively adding to a blender mixer to agitate and extrude, wherein a die head is of a three-layer composite center feeding form; the material is fused and plastified by three extruders, and coextruded by a round opening die; carrying out corona treatment on the film surface, coating on line, baking and sizing. The coating-type light conversion film has the advantages that the coating-type light conversion film is high in strength, high in impact resistance, high in tear resistance, high in light conversion, high in heat preservation, high in light transmittance, and long in lasting period of drip fog dissipation and the like.