The Fuyu and Gaotaizi tight oil reservoirs have the characteristic of low porosity with permeability less than 0.01mD， and poor reservoir property. As a result， conventional well completion cannot achieve the effective development， which can only be made possible by volume stimulation. In the past， this kind of reservoir was treated by SRV fracturing with the long horizontal section（1600m） plus the bridge plug， but it was not well targeted and the fracturing operation was inefficiency. In view of the properties of both reservoirs and the problems in fracturing technology， research was conducted on the new intensive cut coiled tubing fracturing technique with the maximization of the crack controlled reserve as the target and the coiled tube carrying the Y211 bottom hole assembly， and separate fracturing of each cluster. Application in four wells in Block 173-86 resulted in effective SRV， and improvement of the fracturing effect with significantly increased output. The well of Q196-P2 has been fractured up to 118 sections， setting a record in the cut section per single well in China. All the wells are producing by natural flows after fracturing measures， indicating obvious effect.