This paper deals mainly with the test result of using thermal CO₂-releaing method on carbonaceous-siliceous-argillaceous rock type uranium deposits. Evi dence shows the effectiveness of this method. A preliminary discussion is also given on the mechanism of uranium prospecting by CO₂ method, the sampling procedure, the sample processing and the analytical techniques. It is considered that the soil thermal CO₂-releasing survey is undoubtedly a new effective me thod for uranium prospecting.