Abstract: Procedural justice is the extent to which people perceived decision-making procedures as fair. We find four kinds of factors were the moderator of the procedural justice by reviewing the relative theories and the conclusion of the researches; they are as follow, situation factors, personal characteristic factors, distributive outcome factors, and leader factors. At last, the problems of procedural justice research and research orientation are provided, such as, validate the voice effect across culture, explore native procedure justice principle, and further develop the moderate role of the situational factor and so on.

Key words: procedural justice, moderator, voice