The invention provides a method for recovering copper indium gallium selenium from waste of a copper indium gallium selenium solar thin film cell, and belongs to the technical field of resource secondary utilization. The method comprises the steps that the waste in a copper indium gallium selenium (CIGS) solar thin film cell chamber is smashed and milled, then is subjected to sulfatizing roastingto obtain crude selenium and roasting materials, the roasting materials are leached by adding water, and a copper sulfate product is obtained by purifying and crystallizing a water leaching solution;water leaching slag is subjected to alkaline leaching, then an alkali leaching solution is electrolyzed, and gallium metal is obtained; inorganic acid is added to alkali leaching slag for acid leaching, and metal indium powder is obtained by reducing and purifying an acidic leaching solution by formaldehyde, hydrazine hydrate, and iron powder or a mixture of two or three of the formaldehyde, the hydrazine hydrate, and the iron powder in any proportion; and acidic leaching slag is returned for sulfatizing roasting. The purity of the obtained crude selenium is larger than 98%, the purity of theobtained metal indium powder is less than 99%, and the purity of the obtained metal gallium is larger than 99%. The recovery rates of four valuable elements are all above 95%. The method for recovering the copper indium gallium selenium from the waste of the copper indium gallium selenium solar thin film cell is simple to operate, high in safety, high in reliability, and low in cost, scale production is easy to achieve, the environmental protection requirements are met, and the application prospects are broad.