The invention discloses a deep treatment and recycling method for municipal sewage on the basis of biochemical and electrolytic technologies. The deep treatment and recycling method comprises the following steps: (1) anaerobic treatment; (2) anoxic and aerobic treatment; (3) secondary precipitation; (4) nano-catalytic electrolysis (NCE); (5) flocculating precipitation or coagulating precipitation; and (6) filtering. The deep treatment and recycling method comprises the detailed steps of firstly adopting anaerobic treatment for the sewage, then carrying out anoxic and aerobic alternative treatment and secondary precipitation, and then adopting a combined process of electrolysis, flocculating precipitation or coagulating precipitation and filtering to lead the municipal sewage to be treated and reach surface fourth-type or third-type water quality standard. The deep treatment and recycling method disclosed by the invention has the advantages that COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), chromaticity, ammonia nitrogen and total nitrogen are removed by electrolysis; the COD, petroleum and vegetable oil are removed by flocculating precipitation or coagulating precipitation, and simultaneously phosphorus, partial organic matters and total nitrogen are removed; and solid particulate matters (SS) are removed by filtering, and the filtered water reaches the surface fourth-type or third-type water quality standard.