As a motivation tendency, achievement goal orientation(AGO)is a stable trait of individual personality and has its unstable situational characteristics meanwhile. Due to distinct cognitive structures of different AGO, individuals possess different levels of intention of explicit knowledge sharing (IKS1) and tacit knowledge sharing(IKS2), and Individual-based performance appraisal(IPA) as a common situational factor plays an important role in moderating the main effect. On the basis of the hierarchical regression on the data of 678 employee from 51 companies, the empirical results show that both mastery goal orientation(AGO1) and achievement approach goal orientation(AGO2) has positive effect on IKS1 and IKS2, and the positive effect of AGO1 is stronger; As the IPA goes up, the main effects of AGO1 and AGO2 gradually go down; achievement avoidance goal orientation(AGO3) has negative effect on IKS1 and IKS2; as IPA goes up, AGO3-IKS2 goes down, but no moderating effect of IPA is found on AGO3-IKS1.