This paper firstly introduces team reflexivity and team trust to top management team (TMT) theory, sorts out and summarizes relevant literatures, puts forward research hypotheses and theoretical frame, and then studies the mediating effects of TMT team trust between team processes and decision performance and the moderating effects of TMT team reflexivity between team processes and team trust by hierarchical regression analyzing the sample data of questionnaire. The results show that TMT processes have significant positive effects on decision performance; TMT processes also have significant positive effects on team trust;team trust also have significant positive effects on decision performance.Therefore, Team trust can mediate the positive effects of team processes on decision performance. In addition,TMT team reflexivity can moderate the positive effects of team processes on team trust.