Soil organic matter (SOM) was determined by heating method with an aluminum module digesting device, instead of the conventional oilbath heating. The optimal digestion conditions for SOM analysis were digesting temperature of 220℃(Boiling in digestion tube,potassium dichromate solution was about 170℃), and boiling time of 12 min (digestion time of 22 minutes), by which SOM content had small deviation in the standard values of soils, with oxidizing rate and coefficient of SOM of 99.98% and 1.00, respectively. Moreover, the standard deviation (SD) and coefficient of variance (CV) of SOM content in chinese typical soils determined by the heating method with the aluminum module digesting device ranged from 0.06~0.78 and 0.30%~4.11%, respectively, indicating meeting the requirements of the laboratory for SOM analysis. Compared with the conventional oil bath heating, the method developed in this study was easier to operate, safer and simpler, and lower pollution created, along with higher accuracy and precision, so it is promising in batch analysis of SOM content.