Abstract: For the reason that in-situ leaching mining can furthest recover the low grade ore as well as realize low cost and little contamination to the environment,so it shows a great potential in the future.The author summarized the experiences of long-term working on a paleochannel sandstone-type uranium deposit in Kazakhstan by using in-situ leaching mining technology and its well completion technology,hole repair, adding oxidant etc.It thought that it can increase the leaching rate by using determinate type units and transferring parts of the injection well to pumping well.Meanwhile,it also can increase the ionic concentration ofleaching liquid(Fe³⁺),accelerate the transform of Uranous(U⁴⁺)to Uranic(U⁶⁺)and increase the leaching rate and decrease the consumption of vitriol by using the H₂O₂ with the concentration of 60%,finally to realize the purpose of cost reduction.