In this paper, based on analyzing hydrocarbon gas in 213 soil and headspace gas samples collected from near-surface soil in Muli permafrost of Qinghai Province by such geochemical methods as acidolysis hydrocarbon, headspace gas and ΔC. The results indicate that the oil and gas geochemical exploration method has a positive meaning in land gas hydrate exploration and analysis of acidolysis hydrocarbon, headspace gas and content of ΔC indicators in shallow soil, which shows obvious top anomaly characteristics in the place where natural gas can be obtained. The authors hold that the "acidolysis hydrocarbon + headspace gas +ΔC" anomaly can serve as an important indicator to identify the occurrence of nature gas hydrate.