The invention discloses an organic snow-melting agent and a preparation method thereof and belongs to the technical field of applied chemistry.The organic snow-melting agent is prepared from, by mass, 1.5-15% of calcium succinate, 15-30% of magnesium succinate, 3-25% of calcium glutarate, 25-50% of magnesium glutarate, 1-10% of calcium adipate and 10-20% of magnesium adipate.The preparation method of the organic snow-melting agent comprises the following steps of 1, preparing a mixed diacid aqueous solution; 2, calculating and weighing the actual adding volume of salinization reagent; 3, conducting mixing; 4, conducting filtering; 5, conducting decolouration treatment; 6, conducting evaporation for separation.The prepared novel non-chlorine-salt type organic snow-melting agent is mixed with diacid calcium and magnesium and is applicable to snow melting and deicing of places with the temperature being 15 DEG C or above, compared with snow-melting agents of the same type, namely calcium acetate and magnesium acetate, which are commonly used on the market, the applicable temperature range is broadened by about 5 DEG C, and the corrosion damage effect is extremely small; a new path is opened up for recycling of a byproduct, namely mixed diacid, in the nylon production industry, resources are saved, and the environment is protected.