Based on the real drilling data of the bits used in Hailaer oilfield in 2007 and 2008 and according to the formation characteristics and drilling technology, analysis on the bit selection for different layer section and the causes of affecting penetration rate were made, a series of bits fitting to drilling in Hailaer oilfield was selected out. Field test showed that the penetration rate increased 20% and 30% compared with that of 2007 and 2008, footage increased 21.13% and 17.49% and obvious application effect was obtained in Xi47-44 well and Xi44-45 well.