Abstract: In this paper the meteorology background of the forming plume of the forest fire in Northeast of China in 7 th-8 th May 1987 is stated. The long range instantaneous diffusion parameters are calculated using the satellite photograph of the plumes with the lengthes ranged from 100 to more than 500 km. The results of the calculation show that the relations between the instantaneous diffusion parameters and travel time (up to 6×104s) obey the law of linear and 3/2 power. In other hand the heat releasing from the fire in 7th-8th May estimated by puff rising formula at the same order can meet the value gained from a field survey.