In view of the serious leakage and poor plugging effect of bridge plug plugging materials in deep fractured formations of Daqing Oilfield， the thermoplastic composite plugging technology was formed by introducing elastic adhesive materials and mixed with bridge plugging materials. Laboratory tests were carried out in 25 deep wells of Daqing Oilfield. The results show that the thermoplastic composite plugging technology has better plugging effect than that of the bridge plugging technology. The plugging success rate is 100%， the pressure-bearing is 7.5MPa， and finishing drilling ahead of schedule due to vicious leakage has not been occurred.