Abstract: Technology of reduction roasting in suspending of manganese oxide ore are studied in this paper. The roasting temperature was between 800~950℃ when it is roasted in accumulative formation, The transform rate of manganese dioxide transformed into manganese oxide is above 90%. Iron content of roasted product can be decreased 30% by low intense magnetic separation, while loss of Mn、 MnO content is less than 3%. When manganese minerals in from Guangxi Xin-manganese group Co.,Ltd. are roasted, Results of multi-grade suspending pilot test whose capacity is 500kg/h showed that: in the condition of the volume fraction of CO was 4.5％~7.5％, the reaction furnace temperature was 1050~950℃ and the solid-gas ratio was 0.5~0.8 kg/m³,By suspending flash reduction roasting, manganese dioxide reduction index is above 90%. Speculated by test data, The heat need to be supplemented is 1.432×10⁶ kJ/t when 1ton raw material is reduced, Converted into 48.94kg (coal equivalent)/t (ore). The suspending flash reduction roasting reaction process has a wide operating range for parameters such as temperature, atmosphere, solid-gas ratio and so on. The reduction roasting system can be controlled and be operated easily and stably, Reaction time is reduced to 5~60 seconds, Ferromanganese ratio of reduction product are highly improved by magnetic separating purification. New technology provide the technical foundation for taking full advantage of this manganese resources.