1.Polyethylene glycol series products can be used in pharmaceuticals. Polyethylene glycol with low relative molecular weight can be used as solvent, co-solvent, O/W emulsifier and stabilizer, used to make cement suspensions, emulsions, injections, etc., and also used as water-soluble ointment matrix and suppository matrix, solid waxy polyethylene glycol with high relative molecular weight is often used to increase the viscosity and solidification of low molecular weight liquid PEG, as well as compensate other drugs; For drugs that are not easily soluble in water, this product can be used as a carrier of solid dispersant to achieve the purpose of solid dispersion, PEG4000, PEG6000 is a good coating material, hydrophilic polishing materials, film and capsule materials, plasticizers, lubricants and drop pill matrix, for the preparation of tablets, pills, capsules, microencapsulations, etc. 2.PEG4000 and PEG6000 are used as excipients in the pharmaceutical industry for the preparation of suppositories and ointments; It is used as a finishing agent in the paper industry to increase the gloss and smoothness of paper; In the rubber industry, as an additive, it increases the lubricity and plasticity of rubber products, reduces power consumption during processing, and prolongs the service life of rubber products. 3.Polyethylene glycol series products can be used as raw materials for ester surfactants. 4.PEG-200 can be used as a medium for organic synthesis and a heat carrier with high requirements, and is used as a moisturizer, inorganic salt solubilizer, and viscosity adjuster in the daily chemical industry; Used as softener and antistatic agent in the textile industry; It is used as a wetting agent in the paper and pesticide industry. 5.PEG-400, PEG-600, PEG-800 are used as substrates for medicine and cosmetics, lubricants and wetting agents for rubber industry and textile industry. PEG-600 is added to the electrolyte in the metal industry to enhance the grinding effect and enhance the luster of the metal surface. 6.PEG-1000, PEG-1500 is used as a matrix or lubricant and softener in the pharmaceutical, textile and cosmetic industries; Used as a dispersant in the coating industry; Improve the water dispersibility and flexibility of the resin, the dosage is 20~30%; The ink can improve the solubility of the dye and reduce its volatility, which is especially suitable in wax paper and ink pad ink, and can also be used in ballpoint pen ink to adjust ink viscosity; In the rubber industry as a dispersant, promote vulcanization, used as a dispersant for carbon black filler. 7.PEG-2000, PEG-3000 are used as metal processing casting agents, metal wire drawing, stamping or forming lubricants and cutting fluids, grinding cooling lubricants and polishes, welding agents, etc.; It is used as a lubricant in the paper industry, etc., and is also used as a hot melt adhesive to increase rapid rewetting capacity. 8.PEG-4000 and PEG-6000 . 9.PEG8000 .