Abstract: On the basis of the principle of "injection production and storage" in underground gas storage, the underground gas storage must have the ability in high production in a short period, standing sudden and re-peatable change under low pressure and running in a very long term. The six major techniques involved in the design of underground gas storage are introduced. With these techniques, Dazhangtuo underground gas storage, with running program of a working gas volume of 6×10⁸ m³ and a daily peak shaving volume of 500×10⁴ m³, is successfully designed. During the first injection-production running circle in 2001, the gas storage reached all of the designed targets.