Abstract:Abstract：The process technology of a clarified grape juice was established and the application of Monascus pigment in clarified grape juice was studied by using Vitoria grape as raw material.The juicy process included traditional juice expressing method and juice extracting with Vc.Extract juice with Vc treatment was determined based on juicy rate and browning degree.The clarification effect of chitosan，bentonite，gelatin and pectinase was studied by using transmittance T680as an index.The results showed that the transmittance of grape juice was the highest（82.6%±1.5%）when the additive amount of pectinase was 0.08 g/L.The light transmittance of grape juice reached（93.8%±2.7%）after adding 0.60 g/L bentonite for 4.5 h at 4℃，and no obvious precipitation was found after 72 h.The addition amount of Monascus pigment was determined to be 80 mg/kg based on the sensory evaluation results of transmittance and color.Glass bottles were used as sterilization containers.And the germicidal curve of grape juice was determined by a wireless temperature recorder pvq/1tc.According to the pH of grape juice （3.82±0.03），which belongs to the category of acid food，the mould was considered to be the object of sterilization.And the sterilization formula is determined to be 3′-10′/100 ℃ （the initial temperature of grape juice was 27℃）.