Abstract: The coal bed was mad in our country is one kind of emerging pure energy.The coal bed was mad in the development use,mainly is the investment project economical condition which the investor cared about,therefore,To our country coal bed was mad the development use carries on the economic analysis is extremely essential and urgent.This article uses the and loss balance analysis the principle,through the full analysis,the research,unifies our country coal bed to be mad the development use the practice,established had determined our country coal bed was mad the development use investment the lowest production scale and the realization certain profit level goal production scale mathematical model,for the coal bed was mad development use the investor provided one effective quantitative analysis method.