The invention relates to a combined technology treatment method of lead-zinc smelting industrial wastewater, and belongs to the technical field of treatment and application of the lead-zinc smelting industrial wastewater. The combined technology treatment method of the lead-zinc smelting industrial wastewater comprises the following steps: respectively collecting waste acid and acidic wastewater which are produced in a process of smelting lead and zinc in a waste acid adjustment tank and an acidic wastewater adjustment tank; sequentially carrying out limestone powder slurry neutralization treatment and lime milk iron salt treatment on the waste acid, and then mixing the waste acid subjected to the limestone powder slurry neutralization treatment and lime milk iron salt treatment with the acidic wastewater subjected to the lime milk iron salt treatment to obtain a mixture; then carrying out electrochemical treatment on the mixture; thus finally obtaining treating fluid which highly reaches the standard. According to the lead-zinc smelting industrial wastewater treated by adopting the technological method, the procedures are simple, dangerous neutralizing waste residues are less, and the treatment cost is low.