The invention discloses an extraction method for gold and silver in clay-graphite crucible slag. The extraction method comprises the following steps: taking clay-graphite crucible slag powder and a sulfuric acid/silicofluoric acid mixed solution to react; cooling, washing with water and filtering to obtain filter residues and filtrate; after drying the filter residues, carrying out high-temperature calcination; then cooling and grinding to obtain enriched slag; putting the enriched slag into a nitric acid solution and reacting at room temperature; then diluting and filtering to obtain extracting residues I and an extracting solution I; reducing the extracting solution I to extract the silver; putting the extracting residues I into nitrohydrochloric acid; after reacting completely, dilutingand filtering to obtain extracting residues II and a extracting solution II; reducing the extracting solution II to extract the gold. According to the extraction method disclosed by the invention, before being calcined, the clay-graphite crucible slag firstly reacts with the sulfuric acid/silicofluoric acid mixed solution, so that a condition that the clay-graphite crucible slag forms a block ina calcination process can be avoided; the separation of the gold, the silver and other impurities is realized, and the extracting and recycling rate of the gold and the silver is improved.