The invention discloses a production process of an environment-friendly degradable plastic film. The production process of the plastic film comprises the following steps of 1, preparing and screening raw materials such as polyethylene plastic particles, polylactic acid plastic particles and starch plastic particles, 2, melting and mixing the raw materials, 3, extruding the raw materials mixed in the step 2 through a casting machine, 4, cooling the film extruded in the step 3, 5, flattening the cooled film through a flattening device, 6, spraying, washing and drying the flattened film, and 7, slitting and rolling the dried film. According to the production process of the environment-friendly degradable plastic film, the production efficiency can be guaranteed, full mixing of raw materials is guaranteed, and what can be guaranteed is that the plastic film is rapidly and fully degraded.