As the comprehensive weight of evaluation index of quality engineering of railway and intercity rail was difficult to quantify，the evaluation index system was established according to the project of the Hangzhou-Quzhou high-speed railway in Zhejiang province. The AHP-Entropy method based on the five-scale was adopted to calculate the weight. Three characteristic indexes of the system were selected as the object to verify the method on practicability and reliability. The research results indicate that the weight of quality of engineering is maximum，the value is about 80% of the total weight of three characteristic indexes. Which meets the basic requirements of quality engineering. This study reveals that the AHP-Entropy method can be employed to analyze the weight of various indexes in quality engineering. Thus，the research results in this paper can be regarded as theoretical guidance for the rail quality engineering evaluation system.