The present invention provides pure nature low temperature baked cooked black rice flour and a production method thereof, wherein the cooked black rice flour produced through the production process can maintain the original aroma of black rice, has characteristics of low water content, complete sterilization and long shelf life, does not contain any additives, and is a green health food. The production method comprises: removing impurities and peels from black rice rough rice, washing the produced black rice, processing the obtained black rice into cooked black rice with low temperature baking equipment, carrying out a sterilization treatment on the cooked black rice, grinding into cooked black rice flour with a crushing machine, and carrying out packaging at bags according to requirements. According to the present invention, the processed cooked black rice flour maintains the nutrients and the original flavor of the black rice, fat in the black rice is baked to passivate enzyme so as to lock nutrition and not to cause nutrient loss, the particles are fine, the rehydration is good, and the obtained black rice flour can be directly drunk through infusion into the black rice juice with boiling water, and can further be used as the preparation material of porridge rice, food, milks, granules and the like. In addition, the technology can further adopt other rough rice of polished long-grained nonglutinous rice, japonica rice and glutinous rice as raw materials to process into different varieties of pure nature low temperature baked cooked rice powders.