Under the considerahon of heat conduhvity, Joule's dissipation and abnormalresistance, thes paper studies numerically the spontanous reconnction can heat theatmosphere by Joule's dissipation of abnormal resisthee, and thes effect is dependentclosely on the value of β When β is 0.05, 0.1 and 0. 5, the heated atmospheretemperature can rise to 2.0×10
6K, 1.0×10
6Kand 4.0×10
5K respectively, this mayaccount for the achve regions stahc heating and the preheating process of flares.Whn the bottom border is fixed, it will form naatly the helmetJike structure dueto the line-tied effect and the matter will fill down along two "legs" with thevelocity of more than 40km/s. this will lead to redshift of the spectrum.