Abstract: It is one of important measures to reduce blindness in the reconstruction of low yield wells and improve the gas production by purposeful repeated hydraulic fracturing. The main factors about the repeated hydraulic fracturing were systematically analyzed by coal-bed methane resource, the physical characteristics of coal and rock, first fracturing effect and drainage working and so on, the evaluation indexes of first class and second class were established. According to the principle of the multi-level fuzzy synthetic evaluation and the characteristics of the production about coal-bed methane wells, the membership degrees about different levels evaluation indexes were determined. Based on the exploration and development data about part of coal-bed methane wells on Shizhuang south block in Shanxi province, the synthesis selection wells about repeated hydraulic fracturing was evaluated. The results show that: these wells that the daily gas production is more than 1 000 m3 do not need repeated fracturing at present. These wells that the average daily gas production is less than 300 m3 need carefully repeated hydraulic fracturing. These wells that the average daily gas production is between 300 m3 and 1 000 m3 is the first choice to repeated hydraulic fracturing, but the injection parameters need further optimization.