Abstract: The main purpose of this paper is to solve the problem of how to meet the high requirement of hematite pullets process by simulation of the grate-klin process,hematite pullets were researched by different pressed ways. The results showed that it has a poor preheating properties. The compression strength meets requirement with preheating and roasting temperature reachs over 1 075 ℃ and 1 280 ℃. The preheating and roasting temperature decreased obviously by grinding the hernatite,it also show the same affection on roasting and preheating time. During the pullets production,the hernatite being processed by high pressure grinding roller,the roasting and preheating temperature decreased for 60 ℃ and 70 ℃,reduce roasting time for 2 min. With a being grindinghernatite,the roasts process gets a improvement of specific surface and size distribution,which are the main factors affect the microstructure and macro strength of the pullets.