Plastic bag printing method capable of preventing printing material from permeating

The invention relates to the technical field of plastic bag printing, and discloses a plastic bag printing method capable of preventing printing material permeation, which comprises the following steps: S1, debugging printing equipment, keeping the printing equipment in an environment suitable for printing, keeping the temperature of a printing workshop at 18-23 DEG C, and keeping the printing humidity at 55-65%; s2, the plastic bag needing to be printed is treated, low-concentration fluorine gas is introduced, the plastic bag is fluorinated, and therefore the anti-permeation performance of the plastic bag is improved; and S3, ink with low permeability is added, and pattern printing is conducted on the surface of the plastic bag. According to the invention, the plastic bag is subjected to fluorination treatment, so that the permeation of a printing material is reduced, the performance of the plastic bag is changed by treating the plastic bag, and the printing material is difficult to permeate to the other sid