The invention relates to a method for recycling copper from an acid copper chloride etching liquid, which comprises the following steps of: (1) adding 96.0%-98.0% industrial concentrated sulfuric acid into a reactor, adding the acid copper chloride etching liquid into the reactor in the mode of flowing for acid replacement, reacting at the temperature of 130-170 DEG, wherein the volume ratio of the sulfuric acid to the acid copper chloride etching liquid is 0.12:1 to 0.25:1; (2) replenishing water, the volume of which accounts for 10%-25% of acid copper chloride etching liquid, cooling, crystallizing and filtering to obtain crude copper sulfate as a solid phase; and (3) dissolving the crude copper sulfate in water with the volume 1.5-2.5 times greater than the crude copper sulfate while stirring, heating to 85 DEG C, preserving the temperature, filtering to obtain a copper sulfate refining liquid as filtrate, cooling and crystallizing to obtain the product of copper sulfate CuSO4.5H2O, and preparing copper oxide from filter residue which is sodium-contained copper salt. The invention has the advantages that (1) only sulfuric acid is used, the consumption of the raw materials is low, and the cost is low; (2) the copper sulfate product has good quality and high yield; and (3) the method economizes resources, protects the environment and increases economical benefits.