Abstract: It is very urgent to improve the mechanical drilling speed for deep drilling and slim hole drilling. Adding accelerator agent in the drilling fluid is a feasible method. Based on the analysis of mechanism of drilling accelerator, through the improvement of the existing accelerators, a new type of polyglycerol fatty alcohol derivatives has been developed. Mixed with the surface active agent and water soluble diluent, a new drilling fluid accelerator HDS has been made. Compared with other similar accelerators, the results indicated that the new drilling fluid accelerating agent HDS has better solubility, surface activity and reverse wetting ability, and can improve effectively lubrication of the drilling fluid system and anti sticky agglomeration ability. The good comprehensive performance can meet the need of fast drilling.