Formation of Chang 8 in Changqing Oilfield holds a property of low porosity and low permeability. By introducing foreign ideas for volumetric fracturing and experience of reservoir reconstruction, volumetric fracturing was studied and tested in Changqing Oilfield and stimulation is achieved. The aim of this paper is to improve development efficiency through optimization of volumetric fracturing parameters. On the base of analyzing the fracturing geological characteristics of Chang 8 area and put forward a method that using the results of micro-seismic monitoring technology to set a fracturing model, then optimized the fracturing parameters on the base of the model. Finally, get the reasonable fracturing parameters, the reasonable pad fluid proportion is 15%~20%, the delivery rate is 6~8m₃/min, the sand liquid ratio is 11%~13%. The optimizing results are used in other wells in the same area, and get a better stimulation effect.