The present invention relates to a manufacturing method of whole grain powder, which includes the following steps: washing the whole grains； placing the whole grains in a container with screening holes and cooking the whole grains with steam under 100+/-5% degree C for 60+/-5% minutes； then drying the whole grains to have its water content below 3.5%； and performing pulverization. The present invention also provides a whole grain powder product, which is a whole grain powder product manufactured by the aforementioned steps of the manufacturing method of whole grain powder. Because the whole grains are cooked under the temperature of 100+/-5% degree C and are cooked by steam in a container with screening holes, it is not easily occurred with gelatinization, and the whole grain particles may be kept complete to prevent the nutrition from exposing in the environment and reducing the possibility of nutrition oxidation and deterioration. Thus, there is no need to add any food additives to supplement the nutrition after oxidation and deterioration, and the eater will not increase his body burden for the food additives, and may obtain the complete nutrition from the whole grains. The whole grain powder product according to the present invention is also suitable for feeding by gravity and is thus suitable as the tube feeding recipe for long-term care patients.本發明係關於一種全穀雜糧粉製造方法，其步驟如下，清洗一全穀雜糧；再將該全穀雜糧盛裝至一具有篩孔之容器，並以100±5％℃水蒸氣蒸煮該全穀雜糧60±5％分鐘；接著進行乾燥而使該全穀雜糧的含水量為3.5％以下；再進行磨粉。及一種全穀雜糧粉產品，其係經由上述之該全穀雜糧粉製造方法步驟所製造的全穀雜糧粉產品。由於該全穀雜糧的蒸煮溫度為100±5％℃且以具篩孔之容器以水蒸氣蒸煮，因此不易產生糊化反應，而使全穀雜糧顆粒維持完整，以避免養分暴露於環境中而降低養分氧化質變的可能，因而不需要再添加食品添加物以補充氧化質變的養分；因此食用者不會因食品添加物而加重身體負擔，且更可獲得該全穀雜糧完整的營養，且適合用於重力餵食方式，因而使該全穀雜糧粉產品適合作為長照病人管灌配方。
