The invention discloses an oilfield drilling accelerant, consisting of the following components, by weight percent, 5-10% of glycol, 5-10% of tributyl phosphate, 5-15% of sulfonated caster oil, 5-10% of fatty alcohol-polyoxyethylene ether, 10-20% of polyglycerol and the balance of water. The oilfield drilling accelerant provided by the invention is friendly to the environment, overcomes the problem of environmental pollution caused by a fact that the past similar products contain oils, and has a stronger capability of preventing bit balling, a good interfacial activity and a better lubricating capacity.