The drilling works are faced with technical difficulties and challenges such as frequent trajectory adjustment, high frictional drag and torque and pressure support in directional drilling. The turbine hydraulic oscillator converts the static friction between drilling string and the well wall into dynamic friction through mechanical vibration. It has been achieved good effect of friction reduction and drag reduction, and greatly improved the completion success rate of long horizontal section in one trip. The structure and friction reduction mechanism of the turbine hydraulic oscillator is introduced, the special optimization of the structure and performance of the turbine hydraulic oscillator is carried out, the application of the hydraulic oscillator in Fuling area is analyzed, and some suggestions for the popularization and application of the hydraulic oscillator in Fuling shale gas field in the next stage are put forward.