In the present invention, green tea is dried and ground, and brown rice and glutinous rice are prepared. Then, brown rice and glutinous rice are immersed in normal temperature water for 12 hours, followed by pulverization. Alpha amylase and beta amylase are added to water at 40C-60C After stirring well, the mixture was heated in a chamber of 40C-60C for 2 hours while being sprinkled on green tea powder and brown rice glutinous rice powder prepared. Protease was added to the water at 40C-60C and stirred well. The mixture was heated in a chamber of 40C-60C for 2 hours and then in a chamber of 100C for 2 hours. Then, the mixture was dried and powdered to prepare a functional mixture of brown rice and glutinous rice, To a method for producing green tea powder tea which can be easily digested and absorbed even in cold water. Amylase and protease, starch ingredient of brown rice and glutinous rice is sugar ingredient, protein is converted into amino acid and digestion absorption is easy, and in the course of mixing of brown rice glutinous rice and green tea, amino acid of brown rice glutinous rice and saccharide ingredient of green tea meet, To improve the pungent taste of green tea, as well as the taste of brown rice and glutinous rice is added to the green tea powder tea of fresh water and fresh taste, and consumers preference is high, it can be a high-functional health food with high product and market competitiveness. Particularly, the green tea process is omitted, and the process is simplified, and the green tea leaves can be consumed as it is, which has a great advantage that various functional ingredients can be ingested.본 발명은 녹차를 건조 분쇄하고, 현미와 찹쌀을 준비한 후 현미, 찹쌀을 상온의 물에 넣어 12시간 침지한 후 이를 분쇄하고, 40℃-60℃의 물에 알파 아밀라제, 베타 아밀라제를 넣고 잘 저어준 후 준비된 녹차 분말과 현미 찹쌀 혼합분말에 살수하면서 40℃-60℃의 챔버 안에서 2시간 가열하고, 40℃-60℃의 물에 프로테아제을 넣고 잘 저어준 후 준비된 녹차 분말과 현미 찹쌀 혼합분말에 살수하면서 40℃-60℃의 챔버 안에서 2시간 가열한 후 온도100℃의 챔버 안에서 2시간 증숙한 다음 건조, 분말화 하여 현미와 찹쌀의 건강 기능성분과 녹차의 당류성분이 잘 소화 흡수 될 수 있는, 냉수에도 간단히 음용할 수 있는
