The invention discloses a method for regenerating a precious-metal mercury-free catalyst for acetylene hydrochlorination. The method comprises the following steps: (1) carrying out drying treatment; (2) carrying out treatment by using regeneration reagents such as an acid mixture of hypochlorous acid, chloric acid, perchloric acid, hydrogen peroxide and hydrochloric acid, formic acid, acetic acid and tartaric acid; and (3) carrying out water washing and baking. According to the method, the performance of the deactivated precious-metal mercury-free catalyst can be restored, and the precious-metal mercury-free catalyst can be recycled, so that the use cost is greatly reduced; and the implementation process is environmentally friendly, so that a foundation is laid for non-mercurization of calcium-carbide-process PVC industry.