The invention relates to a method for evaluating damage conditions of an asphalt pavement. The method includes the following steps that firstly, pavement damage data is acquired; secondly, the transverse crack evaluation index (TCEI) of the pavement is calculated; thirdly, the pavement patching condition index (PPCI) is calculated; fourthly, the pavement surface damage condition index (PSCI) is calculated; fifthly, attribute weights of the three indexes are calculated by adopting an analytic hierarchy process; sixthly, grade weights of the three indexes are calculated by adopting an entropy method; seventhly, the comprehensive weight is obtained according to the attribute weights and the grade weights of the three indexes; eighthly, an evaluation model of the pavement damage condition index (PDCI) is established, and an evaluation result of the pavement damage condition is obtained according to the calculated the value of the PDCI. The method for evaluating the damage conditions of theasphalt pavement through a variable-weight comprehensive evaluation method is established, the dynamic weight of each evaluation index is calculated by combining the analytic hierarchy process and anentropy weight coefficient method, and the evaluation result is more accurate.