Two kinds of rice were studied in order to find out the distribution of bacteria and mould in the summer and autumn rice production line. The results showed that in the process, from raw materials to rice products, the number of bacteria and mould gradually reduced, but the total number of bacteria in each sampling point was higher than that of mould. The difference of the total number of bacterial and mould was very significant for samples from different site（α<0.0001). The source of rice has a significant impact on the number of bacteria and mould but the season has little effect on it.