Leakage drilling and cement plugging are often used when geological drilling encounters completely leak formation. It is suggested that the dry hole section measures can be taken for leakage drilling such as long running water at hole opening， pouring high consistency grout， pouring foam slurry and applying grease on drill pipe. While for the cementing plugging， adding anti-dispersant， hardening accelerating and flash setting agent， retarding agent and cement ball cemedin can be used. The drill hole plugging ball is developed， and the structural characteristics， operation process and principle are explained and discussed， which is intended to solve the contradiction of “arge particles are easy to bridge but hard to enter the crack while small particles are easy to enter the crack but difficult to bear pressure” for the traditional inert plugging material.