The effective prediction of the high production zone of the coalbed methane（CBM）is important to improve the single well production and the development benefits. In order to quantitatively evaluate the production capacity of the CBM reservoir，the gas-bearing index，desorption efficiency index of CBM，gas-water production efficiency index and production capacity index were defined through theoretical and statistical analysis of the CBM development data in southern Qinshui Basin. Results show that the daily gas production rate increases with the increase of gas-bearing index，desorption efficiency index of CBM and gas-water production efficiency index，however the correlations is not obvious. The daily gas production rate can be higher than 800 m3/d when the gas-bearing index is higher than 100 m·m3/t，the desorption efficiency in? dex of CBM is higher than 0.04（MPa·d）-1，or the gas-water production efficiency index is higher than 1 mD·MPa. The gas-production capacity index is the product of the gas-bearing index，desorption efficiency index of CBM and the gas-water production efficiency index，and it can effectively characterize the production capacity of CBM reservoir. A higher gasproduction capacity index results in a higher daily gas production rate. When the gas-production capacity indexes are higher than 0.3 and 10 mD·m·m3（/ t·d），the daily gas production rates are higher than 800 and 1 500 m3/d，respectively.