The invention discloses a plastic woven fabric printing machine. The plastic woven fabric printing machine comprises an emptying device, a flexible printing device and a winding device, wherein the emptying device comprises an emptying machine base, a supporting column, a bearing seat, a balance beam, a U-shaped positioning block, a first rotating wheel, a second rotating wheel, a stand column, a guide wheel seat, a first guide wheel and a first pressure wheel; the flexible printing device comprises a printing stander, an intermediate deviation correction mechanism, a main traction device, a front side printing device and a back side printing device; the back side printing device and the front side printing device have an identical constitution and an identical structure and are installed on the left side of the main traction device in a mirroring manner; and the winding device is arranged behind the flexible printing device. Hot air for drying and a cooling fan for lowering the temperature are also arranged behind the front side printing machine and the back side printing machine, and then a two-sectional drying way of the hot air drying is adopted, so that the drying effect is guaranteed, the input of excessive heat is avoided when in drying, the elongation variation of a printing material is stabilized, and the color register is more accurate.