Abstract: Based on the study on the environmental geological problems such as deep rock's integrity of coal mining area, the change of shallow rock's bearing capacity, groundwater and surface water in Tai'an, this paper analyzes the geologic environmental effect in subsidence area. It shows that the present extracting technique of coal has great effect on geologic environment. And some area has been greatly influenced, unlikely recover any time soon. The surface subsidence caused by coal mining has little effect on agricultural production but great effect on landscapes, the ground stability, the surface water distribution area and the water level. The negative environmental effects above are bad for the economic development in coal mining subsidence area and they have significantly hindered the rational exploitation and utilization of groundwater. In response to these issues, this paper provides the reasonable plans of coal planning area in the countermeasures part which can reduce or even avoid the negative environmental effects and encourage the normal development of economy, realizing the consideration to environment and economy benefit.