This series of products make use of the old electrolytic device to carry out maintenance and transformation and transform it into the membrane electrode distance electrolytic cell with high electric density. On the basis of maintaining the original electrolytic cell structure, nickel elastic mesh, nickel base mesh and active cathode mesh are installed on the cathode net to reduce the electrode spacing to the thickness of the film, which is assisted by the technology of reducing bubble effect and active cathode technology to effectively reduce the cell voltage and prolong the service life of the electrode. Electrolyzer type includes Ashhi Kasei(NCH), BiTAC,F2, UhdeBM2.7 etc.