The invention provides a 
sulfur-dioxide-free full juice fermented orange 
wine and a production process thereof, belonging to fermented fruit wines and production technologies thereof. The production process comprises the steps of making the juice turbid and making the pulp 
resist oxidation, adjusting the acidity of the juice and neutralizing bitter precursor substances, making the juice 
resist bacteria and adjusting the 
sugar content, preparing 
mother liquor of the 
wine, blending and fermenting the juice, 
ageing the 
wine base, fining and blending the aged wine base and adjusting the taste of the aged wine base, wherein the juice comprises 
essential oil, 
calcium oil and bitter substances. The orange wine has the beneficial effects that an innovative process of replacing SO2 with a composite of non-toxic materials such as antibacterial and oxidation-resistant D-
erythorbic acid, 
nisin, 
sorbic acid, 
chitosan and the like is adopted; compared with traditional processes, in the production process, the operation of adding toxic gaseous and liquid SO2 step by step is 
safer and more convenient; the production process is an innovation of popularizing the traditional processes of wines for more than a hundred years to make wine with other fruit raw materials; the 
navel orange wine produced by the technology does not contain SO2 and has the advantages that the content of 
methanol is reduced by about 90%, the content of fusel oil is reduced by about 65% and the harmful ingredients such as bioamine, 
sulfate, 
methanol, fusel oil and the like are controlled compared with the fruit wines produced by the traditional processes.