There are four methods which are providing for single well production methods, reasonable gas production rate, abundance method, obtaining well spacing by using analogy theory on calculating theory well spacing of He-2 3 gas reservoir, obtain rational theory well spacing as 680~780m. And calculating the current actual well spacing, get average well spacing of 580m. Final this article make analysis of rational well spacing through being compared with the similar gas field and the development plan in 2004, and conclude that：1, Now the gas production rate of He 2 3 gas reservoir reaches 3.32%. That it’s too fast will make reservoir pressure drops rapidly, affecting the final recovery efficiency. 2, The average spacing (580.3m) is slightly too small. And well spacing is of uneven distribution. 3, On the whole, it appears that pattern efficiency of Daniudi He2 3 gas reservoir has reached about 79%, and there is little encrypted space. It belong to the improved pattern.