The subject of this study is to evaluate the efficacy of HACCP system in a pure orange juice -producing line. The principle and method of HACCP were applied during the study through spot surveillance and laboratory analysis for material, semifinished product and product. All hazards and risks in the producing process were found and assessed.On the basis of the above work and according to the critical control point decision tree recommended by CAC,three critical control points were decided.Critcal limit, monitor system, corrective system, verifing system and recording system were established for each critical control point. After the application of the HACCP system, the safety concept of staff was advanced and the product quality improved, which indicate that the established HACCP system is reliable and effective.