Abstract: During the hole-making process of carbon/epoxy (C/E) composites, many kinds of processing damages are easy to appear such as burr, spalling and delamination. Reasonable and effective evaluation of processing damages is an important guarantee for the economy and reliability of the composite components. Due to the singleness and limitation of the existing evaluation method of fiber reinforced composite hole-making damages, firstly, a new and comprehensive evaluation method, which based on the relative index in statistical analysis, was proposed by overall taking consideration of burr, spalling and delamination damages and a mathematical model of damage factor was proposed. Then, according to the relevance of the evaluation indexes, all coefficients in the mathematical model and the critical value of damage factor, which decided whether composite hole-making quality is qualified, were determined through tool wear tests. At last, the precision of the proposed method was verified by ultrasonic detection. Results show that the comprehensive evaluation method of C/E composite hole-making damage proposed could effectively reflect and assess the hole-making quality under different processing parameters.