Abstract: The favorable area optimization of the multi seams area would include the plane section optimization and the vertical layer section optimization.Accordin g to the insufficiency that the available coalbed methane evaluation system was hard to adapt many features existed in the multi seams combined mining and developm ent mode of the multi seams area, based on the previous study results and objective reality of the target area, the paper provided the plan optimized method of"the slici ng subarea based on the geological model" according to the multi seams area and the vertical optimized method of"the weights optimization of the major geological para meters + the optimization of the numerical simulation capacity' "based on the theory of the overlay gas bearing system. The study showed that the geological modeling a nd the overlay gas bearing system theory would be the two important theoretical bases to distinguish the optimized evaluation of the coalbed methane development in a single seam area. Meanwhile, the optimized study focused on the coalbed methane development in the multi seams area should concentrate the parameter inversion te chnology of the coal reservoir and the fine description, the influence factors of the optimized system and the main controlled factor study, the difference analysis on the evaluation method of the optimized system and the geological modeling as well as the application of the numerical simulation software.