According to geological characteristics and drilling difficulties in Haita district, drilling technical study and field test were made for drilling speed-rising plan. Technical difficulties caused by collapsing of upper-part formation, easy deviation in mid-part formation and hard bottom part formation were solved with the optimized and fast drilling realized. The paper analyzed the field application in borehole structural optimization, optical selection on drilling bit and parameters and compound drilling with the case of Xi 50-54 well, and it showed the great improvement on penetration rate and drilling period.