The invention discloses a plastic film and a preparation technology thereof, relates to the technical field of production and processing of the film, and solves the problem that the film is prone to break due to the poor overall strength during use. The plastic film comprises the following components in parts by weight: 35-50 parts of polystyrene, 12-20 parts of polyvinyl alcohol resin solution, 6-11 parts of polycarbonate, 5-8 parts of porous silica sol, 4-9 parts of expanded perlite powder, 7-16 parts of bamboo fiber, 4-5 parts of rosin pentaerythritol ester, 2.2-3.5 parts of plasticizer and0.8-1.5 parts of antioxidant. The plastic film prepared by the technology has good structural strength during use, is unlikely to break and has good durability.