The invention discloses an antimony powder converting furnace which comprises a converting furnace body (1), a dust flow separation device (2), an acceptable product collection tank (3), a rejected product collection tank (4) and a total delivery pipe (5). The dust flow separation device (2) is erected above the converting furnace body (1) and communicates with the converting furnace body (1) through the total delivery pipe (5), a circulation water jacket (6) is arranged on the periphery of the total delivery pipe (5), a water inlet pipe (61) of the circulation water jacket (6) is arranged at the lower end, a water outlet pipe (62) of the circulation water jacket (6) is arranged at the upper end, the acceptable product collection tank (3) communicates with the dust flow separation device (2) through a first transfer pipeline (31), and the rejected product collection tank (4) communicates with the dust flow separation device (2) through a second transfer pipeline (41). Accordingly, produced antimony powder can be rapidly cooled and can rapidly pass in the total delivery pipe.