In order to overcome disadvantages of conventional leaching technique such as high energy consumption and low productive benefit,and get better utilization of uranium resource,the study on uranium extraction from certain alkaline uranium ore with heap leaching process have been carried out according to the characteristics of the ore such as high content of carbonate and low grade of uranium.The experiments of acid agitation leaching,alkaline agitation leaching,removing organic material with roasting,the heating leaching of original ore and the heating alkaline leaching of roasted ore were carried out.The experimental results showed that the leaching rate of agitation leaching at ambient temperature is only about 65%,the leaching rate of heating leaching with original ore is about 80%.An effective process to extract uranium from the lower grade alkaline uranium ore was found out so as to supply the base to extended tests of heap leaching.