Preparation method of crystalline maltose

The invention relates to a preparation method of crystalline maltose. The preparation method is characterized in that crystalline maltose is prepared through crystal growing at the constant temperature of 65-85 DEG C and cooling crystallization with food-grade maltose insoluble in maltose syrup at the temperature of 65-85 DEG C as a seed crystal. The operation process is simple, the production cycle is short, the efficiency is high, the obtained maltose is high in yield and purity and contains few impurities and the method is a functional sugar production technology applicable to industrial production. 本发明涉及种结晶麦芽糖的制备方法，其特征在于，所述结晶麦芽糖以加入到65~85℃麦芽糖糖浆中的不溶的食品级麦芽糖作为晶种，经65~85℃保温养晶、降温结晶后制备而成。本发明操作过程简单，生产周期短、效率高，所得麦芽糖收率高，且纯度高、杂质少，是种适用于工业化生产的功能糖生产技术。