Some reservoir in the area of Pucheng in zhongyuan oilfield is dolomitic mudstone with mangy microfracture and pore space，but its permeability and porosity are very low．Considering its huge remaining oil potential，it is determined to implement multistage hydraulic fracturing at P1-FP1 well．Through that we studyed reservoir quality,analysed the minifrac and optimized fracturing parameters by fracturing software to acquire the appropriate fracturing operation parameters，and selected the optimal fluid and proppant．It has been successfully completed on the field，and a total of 2975 m3 fluid was pumped down into the hole with 308 m3 proppant added，and it obtained a certain effect after fracturing．The successful application will provide the technical basis and operation experience for the fracturing of the dolomitic mudstone reservoir.