The invention belongs to the field of machinery manufacturing, and particularly relates to a rubber production technology which includes seven steps: crushing, cleaning, melting, modifying, vacuum-defoaming, sizing and vulcanizing waste rubber, wherein oxygen plasma activated carbon tubes and modified starch and pigments are added into a reaction still to be mixed evenly with rubber cement by stirring for modification; the content of the oxygen plasma activated carbon tubes is 2-7% and that of the modified starch is 9-12%; a mixture of magnesium aluminum hydrotalcite, ammonium polyphosphate and magnesium hydroxide is added during the sizing process, and in the mixture, the ratio of magnesium aluminum hydrotalcite to ammonium polyphosphate to magnesium hydroxide is 2:1:2. After a series of treatment, the waste rubber is changed into treasure, the old rubber is purified, and the ductility, oxidation resistance and flame retardancy of the reproduced rubber are improved.