Belonging to the technical field of fine chemical industry, the invention in particular relates to a method for synthesis of calcium cyanamide with calcium chloride. The method includes: taking calcium chloride, carbon monoxide and urea as the raw materials to synthesize the target product calcium cyanamide under the action of a catalyst. The method provided by the invention has the advantages ofsimple operation steps, low energy consumption, short production cycle, high product yield and purity, and meets the quality requirements of the market for calcium cyanamide; the raw materials are easily available and cheap, and have no geographical limitation; the reaction does not generate waste, and has high environmental protection value. The method improves the product yield and quality, andgreatly lowers the production cost.