Abstract: Hydraulic pulsating-cavitation jet compound drilling is a new drilling technology and makes full use of mechanic energy and hydraulic to improve penetration rate. The pulsating-cavitation jet generator is located between bit and screw drilling string. The mechanism of the new drilling technology relies on the combination of high rotating speed of the conventional compound drilling and effectively bottom clearing of the pulsating-cavitation jet to improve the penetration rate. Field experiments in 4 boreholes of Yingmai and Lunnan districts demonstrated that the hydraulic pulsating-cavitation jet compound drilling could improve the penetration rate by 12.67 percent more than the conventional compound drilling and by 26.2~55.36 percent more than the conventional string drilling. This technology is valuable for popularizing in drilling engineering.