The assessment of college and university counselors and student management team has been one of the important issues that colleges and universities are concerned about. This paper applies the group decision-making model to the assessment of college counselors’ student work, and establishes the group decision-making model of college counselors’ assessment work according to the actual work of counselors. Attitude consensus threshold is set, and ACT is combined with individual feedback parameters to realize the balance between individual minimum correction and group consistency. And the method of mutual evaluation and scoring by five appraisal subjects is used to construct Markov matrix, and then the limit distribution of the matrix is found through linear weighting. Finally, the appraisal of 105 counselors was empirically analyzed, and the group decision-making model was used to give practical significance to the five appraisal items, namely, sense of efficacy, dedication, leadership, innovativeness, and executive power, one by one. The results show that for the 205 college counselors tested in the appraisal, the mean value of the student management work ability index is 30.55, and the maximum value is 90.95, and the results of this appraisal pass the test and have practical reference significance.