The invention discloses a safe preservative film with high transmittance and a preparation technology thereof. The safe preservative film is characterized by including: by weight, 1200-1400 parts of polyethylene, 100-120 parts of calcium carbonate, 4-30 parts of sodium alginate, 100-200 parts of polyvinyl alcohol, 10-150 parts of chitosan, 300-600 parts of dicapryl phthalate, 6-10 parts of ultraviolet ray absorber, 6-40 parts of antibacterial agent and 100-140 parts of polyethylene wax, wherein dicapryl phthalate is plasticizer. The preparation technology is simple and has low product cost. The film weight is increased by adding moderate inorganic particles, and the transparency of the film is increased, further the intensity and softness of the film are increased, which makes the preservative film has good preservation effect. Moreover, bacterial growing can be prevented by adding antibacterial agent to guarantee health of the fruit and vegetable.