The utility model relates to an oil, coal gas and coking industrial technology field especially indicate a device for treating impurities in coal -tar pitch, which comprises a tank body, jar body top articulates there is the apron, jar internal be equipped with two -layer hot plate, the hot plate is installed at the jar internally through the installation piece, be equipped with a plurality of through -holes on the hot plate, be equipped with air outlet channel on the apron, jar body bottom is equipped with discharge chute, the last control valve that is equipped with of discharge chute. The utility model discloses an above -mentioned technical scheme's beneficial effect as follows: simple structure, it is rationally technological, convenient to use, through the different characteristic of fusing point in the coal tar raw materials, the by heating board heats the coal tar raw materials, and the discharge chute discharge is extremely passed through in jar body bottom to the through -hole downward flow after the heating of coal tar raw materials on the fusional pitch by heating board, and the through -hole on the gaseous by heating board that produces simultaneously passes through the air outlet channel discharge, remains the impurity of coal tar between two hot plates to realize the impurity treatment of coal tar.