In order to study the characteristics of cadmium absorption of wheat and oat by reducing chemical fertilizer and applying different organic fertilizers. On the basis of 20% reduction of chemical fertilizer application, four fertilization treatments were set up to study the effects of different organic fertilizers on the accumulation, distribution and transport of cadmium in crops: manure 30000 kg/hm2 (AM), bio organic fertilizer 600 kg/hm2 (BF), manure 30000 kg/hm2 + bio organic fertilizer 600 kg/hm2 (am+bf) and normal fertilizer application (CK). The results showed that the combined application of organic fertilizer could reduce the cadmium absorption of crop organs.Compared with CK, the cadmium content in wheat grain decreased by 15.79%-36.84%, the grain enrichment coefficient decreased by 8.02%-24.55%, and the transport coefficient from root, stem, leaf and ear to grain decreased by 5.79%-56.28%; Compared with CK, the content of cadmium in oat grains decreased by 11.76%-47.06%%; The grain enrichment coefficients of BF and am+bf treatments decreased by 38.46% and 30.77% respectively; The transport coefficient from root, stem, leaf and ear to grain decreased by 16.2%-32.77%; After grain filling, the content of cadmium in oat grains increased and the content of cadmium in stems decreased. The biomass of the two crops increased by 6.78%-11.00% under the combined application of organic fertilizer; After heading, the transfer amount, transfer rate and contribution rate of cadmium from organs to grains were highest in stems. The above results showed that the combined application of organic fertilizer could reduce the content, enrichment coefficient and transport coefficient of cadmium in crop grains, improve the safety and quality of agricultural products, and the effect of reducing cadmium in oat grains was better than that of wheat. It was found that the transport of cadmium from stems to grains after heading was the main source of cadmium accumulation in grains.