The invention relates to the technical field of plastic production, in particular to environment-friendly full-degradable plastic and a production method thereof. The environment-friendly full-degradable plastic is prepared from the following components in percentage by weight: 1-3% of konjak flour, 4-7% of flour, 0.2-0.4% of glycerol, 3-5% of quick lime, 0.8-1.2% of polyvinyl alcohol, and 0.3-0.6% of a plasticizer, with the balance being water. The invention further discloses the production method of the environment-friendly full-degradable plastic. The method comprises the following steps: crushing konjak by a crusher, proportionally weighing the konjak flour and the quick lime powder, adding water, putting the obtained mixture into a water bath kettle, heating, stirring, decocting intoa porridge form, putting the obtained mixture into a mixer, proportionally adding the flour, the glycerol, the polyvinyl alcohol and the plasticizer, uniformly stirring, and granulating in drying andgranulating equipment. The method is reasonable in process, can eliminate harmful components in the plastic, has the characteristics of easy degradation and environmental protection, and does not cause environmental pollution.