Abstract: Jin 58 well block of Hangjinqi belonged to a tight gas reservoir with low porosity and fracturing was needed for effective production.He 1 reservoir in the well block was of high rock brittleness and large sand bodies span.Multiple gas layers were developed and there was thin shale interlayer between gas layers.Compared with the development experiences of unconventional oil and gas reservoirs abroad,the adaptability of the mixed water fracturing of He 1 reservoir was analyzed.The results indicated Hangjinqi 58 well block is suitable for the mixed fracturing.In combination with the reservoir property,the parameters and liquid system of the mixed water fracturing construction were optimized,which achieved a good production increase effect in field testing.