Abstract: Using dynamic analysis,numerical simulation,trace and analyse the change rules of fire well injection pressure,oil well production,oil layer oil saturation and temperature pressure in the testing process of Gaoshen Gao 3618 block in situ combustion oilfield.Testing have gained certain effect.At present,all fire wells ignite successfully and are under high temperature oxidizing fire condition.Fire wire promote gradually,reservoir temperature field come forth,oil well influence generally with certain oil increment.Reservoir oil saturation changes indicate the characteristic of gravity drainage,vertical setting of injection and production well play role on oil well effect.Meanwhile,many problems exist in basic research,fire flood front monitoring,dynamic control,production technique and fall gas treatment,which need further solution.