The invention discloses a wet cleaning treatment method for lead chloride slag. The method comprises the following steps: 1, coordination leaching of lead chloride slag, namely performing coordinationleaching on the lead chloride slag by taking an ammonium acetate solution as a coordination leaching agent, and performing solid-liquid separation after leaching completion so as to obtain a leachingsolution containing a lead complex and leaching slag; 2, performing diaphragm electrodeposition on the leaching solution to extract lead, and performing diaphragm electrodeposition by taking the leaching solution containing the lead complex obtained in the step 1 as cathode liquor and taking an ammonium chloride solution as anode liquor so as to extract lead; and 3, performing post-treatment on an electrolytic stripped solution, returning the cathode electrolytic stripped solution obtained in the cathode chamber to be used for leaching after electrodeposition completion, adding a neutralizerinto an anode electrolytic stripped solution in the anode chamber to regulate the pH value, and returning to the step 2 to serve as the anode liquid for later use. According to the method, various lead chloride slag can be cleaned and efficiently treated, and the electric lead product with high purity is directly obtained. The wet cleaning treatment method disclosed by the invention has the outstanding advantages of being high in raw material adaptability, simple in process flow, clean, environment-friendly and the like.