Abstract: According to the actual conditions of the high utilization of PDC bit in Beibu Gulf region,combined with stratigraphic characteristics of the study area and the usage of drill bit,summary and analysis has been conducted on the success and deficiency in PDC bit selection,the judgment of abnormal condition and the matching technology,the proposal has been put forward about selection of bit type in drilling dark grey carbonaceous mudstone,drilling with corner motor in plastic mudstone,choosing the PowerDrive system or corner motor according to the length of the open-hole,and strengthen the prevention and treatment measures of abnormal conditions during drilling with PDC bit,which can play a very important role in high efficiency drilling with PDC bit,and can be used to realize the objective of decreasing the cost and increasing efficiency.