As a kind of groundwater pollutant, chromium metal was taken as a subject investigated in the paper, then the specific application of insitu electrochemical dynamic repairing technique was researched and electrochemical dynamic principle in constant voltage and constant current was analyzed. Meanwhile, repairing simulated tests of static and dynamic pollution to groundwater were carried out；migrating regulation of heavy metal in groundwater under electric field was also uncovered. It is indicated by test results that repairing effects to heavy metals in groundwater by this technique is quite well, and it is feasible in practical engineering application, and that the removal efficiency of Cr(Ⅵ) will be over 99.95%, meanwhile, outflow concentration will meet related standards.