Abstract: The fusion point of ash from No.12 Mine was investigated after CaO and Fe2O3 were respectively added as fusing agent. At the same time, the gasification activity of chars added different quantity of fusing agent was examined at 1 300 ℃～1 550 ℃. The results showed that the appropriate addition should be 3%～7% for CaO and 5%～10% for Fe2O3 respectively. There was close relationship between the influence of quantity of additives on gasification activity of char and the gasification temperature. At relatively lower temperature, the gasification activity of char increased with increasing quantity of fusing agent. However, the influence became little with increasing temperature. When temperature was up to 1 550 ℃, the influence of fusing agent almost vanished because of the fusion and agglomeration of fusing agent at higher temperature.