The utility model discloses a transformer coil pouring waste utilization device. The casting mold comprises a cushion block casting mold and a plurality of coil casting molds which are arranged side by side, the cushion block pouring mold is positioned in front of the coil pouring mold; the mixing tank sequentially conveys pouring liquid to the cushion block pouring mold and the coil pouring mold,before the pouring liquid is conveyed to the coil pouring mold, the residual pouring liquid is conveyed to the cushion block pouring mold, the cushion block pouring mold is used for forming the insulating cushion block through injection molding, the requirement of the insulating cushion block for the machining precision is not high, and the quality of the insulating cushion block is not affectedby residual substances cured in advance. According to the utility model, pouring liquid which is originally discharged as waste is processed to form the cushion block, so that secondary utilization ofthe waste is realized, and waste and pollution are reduced.