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Leather tanning agent, a tanning agent in formaldehyde resin composite organic compounds, can increase the fullness of leather, and is the first choice for tanning agent of shoe upper leather. The designed product of the bridge is sulfone resin, which is mainly composed of sulfonation reaction, condensation reaction and sulfone formation reaction. Raw materials are formaldehyde and phenol, and sulfuric acid is used as catalyst. The production process is simple, the equipment is simple, the operation is easy, and the cost is low. It is the first choice for producing organic compound tanning agents. Because the product water contains phenol and formaldehyde, this design is submitted to Zhejiang Jiang Jiamin Plastic Co., Ltd. for wastewater treatment, which can effectively reduce environmental pollution. Design, market situation, development trend and forecast of products and their raw materials. In addition, this design also introduces the overall layout of the factory, introduces the equipment selection and layout, and makes the necessary material balance for the workshop. Moreover, public works including water supply and drainage, gas, electricity, ventilation, instruments and so on have also been preliminarily designed. The designed output is 5000 tons of phenolic resin leather retanning agent. The total number of workers in the factory is 30, and the annual production is 330 days. The total equipment investment budget is 5190,000 yuan, and the construction investment budget is13.954 million yuan, of which the total annual raw material cost, wages and benefits, including loan interest and other expenses are 40.276 million yuan, and the product sales are expected to be 45 million yuan.