Abstract: In order to study climate response to anomalous decrease of toeal radiation at surface induced by regional disastrous fire such as oil field or forest fire,some numerical experiments have been performed by using a five-layer primitive equations model. The results of these experiments show that 1) the anomalous decrease of total radiation in the fire region not only causes atmospheric cooling (especially near surface) but also modifies the thermal structure and circulation of the atmosphere and the effect is like an"anomal cold high"being added in the atmospere over the fireregion and its neighbour region; 2) the effect would be diffrent with diffrent region or season; 3) in the Tibetan Plateau region the anomalous decrease of total radiation would weaken the monsoon; and 4) in general,the climate response to anomalous decrease of toeal radiation is less important in contrast with the effects of interannual change of climate,except for the decrease of the temperature near the surface.