Corn syrup dry powder is a widely used organic nitrogen source for microbial growth, and it can also promote the biosynthesis of various antibiotics, amino acids and enzymes. In the process of biological fermentation, it is used as a nutrient supplement such as water-soluble plant protein and water-soluble vitamins. Although the physical and chemical indexes of corn syrup dry powder from different manufacturers are similar, the corn syrup dry powder is obviously different in the process of microbial fermentation due to the differences of raw materials, manufacturers and production processes, which greatly affects the yield of finished products. Qiqihar Runxin Corn Biotechnology Co., Ltd. Luhe brand corn syrup dry powder has obvious fermentation effect-high fermentation unit, which is especially suitable for microbial biochemical pharmaceutical fermentation.