1. SFB-1 biology thickening agent for drilling agent has strong ability of anti- temperature. The drilling mud still has very good stability when the temperature is higher than 150. It has the feature of contain low, thickening high, and suspension high. 2. SFB-1 biology thickening agent for drilling agent has the good feature of falling water losing, dissolving even, and improving the thick, anti-shearing, and anti-polluted. 3. SFB-1 biology thickening agent for drilling agent be preparation job site. Maintaining and processing is simple. For example, preparing the non-solid drilling agent doesn’t harm the reservoir. 4. After using SFB-1 biology thickening agent for drilling agent, the drilling agent materials is singularity, the cost is low, and the economic efficiency is better.