The invention discloses a sea squirt cellulose blending modified pullulan-grafted pineapple fiber packaging film. The packaging film is prepared from, by weight, 115-120 parts of pineapple leaf fiber, 5.6-6 parts of composite cellulase, 2.8-3 parts of nanometer magnesia particles, 4.3-4.4 parts of citric acid, 18-19 parts of sea squirt cellulose, 21-22 parts of pullulan, 4-5 parts of carbon nanotube-TiO2 composite material, 5-6 parts of polygonum cuspidatum extract, 11-12 parts of bamboo fiber, 17-18 parts of superfine starch, 4-5 parts of glyceryl stearate, 2-3 parts of kappa carrageenan, an appropriate amount of water and an appropriate amount of deionized water. According to the packaging film, the pullulan which is grafted with the carbon nanotube-TiO2 composite material and subjected to blending modification of sea squirt cellulose is adopted for combining a nanosized pineapple leaf cellulose solution and other ingredients, all the materials are subjected to ultrasonic-assisted emulsifying shearing to prepare a homogeneous film solution which is used for preparing the pineapple cellulose film, and the pineapple cellulose film has certain antibacterial and light degradation properties and good air permeability, stretching resistance and fracture resistance.