Abstract: Based on the gasified reaction mechanism and computer emulated sinulation and calculation tfechnology .acold state and hotstate reacion mathematcsmodel of the pressurized gasifer with the tog-blown pulverized coal was applied to analyze the opertion racks of the pulverized coal paticlefiow under the cod stat.the fiow field structure features of the gasifier under the co dition of the hot state and the infuence law of the wall heat transfer and slagging A fow feld partion stoucture theory of the top blown pulverized coal pressurized gasifir was proided.The theor and actual gastfier operation were combined to a mutual rfcaion.Thestusy results showed that under the condition of cold state,there was a momentum ransfer existed between the continuous phase and particle phase the oxygen rotation could drive the rotary movement ofthe pulverized coal paricles and there was grea ifference exsted in fovw rield structure of th diferent area of g asifer.n the midlearea.the turbulence mixed efiect was the best and also would be the area of thorough heat chemical reacion.The ach areaofgasfer vas the weak turbulence area.te temperature was low and the slag layer distribution would bein sof and uneven distributedfeatures.The operation resulis of the gasifer showed hat during the opeation of new combined burner,the effective gas content of syngas was improved by 2% and the slag paticles from the gasification would be fine and even.