The invention discloses a production method for basic copper chloride. The production method comprises the following steps: respectively preheating an acid etching waste liquid and a basic etching waste liquid to 43-55 DEG C, further mixing the waste liquids in the presence of a basic copper chloride crystal seed, enabling the mixture to react under conditions that the temperature is 68-72 DEG C and the rotation speed is 65-85 r/minute, so as to obtain a mixed liquid with basic copper chloride, and filtering the mixed liquid, thereby obtaining basic copper chloride, wherein the addition amountof the basic copper chloride crystal seed is 70-100 Kg/15m<3>. A basic copper chloride product produced by using the method is dark green and uniform in granule, and in addition, the content of copper in the basic copper chloride product is greater than or equal to 58.5 w/%, and the basic copper chloride product is applicable to industrial production.