Polyethylene glycol with a relatively low molecular weight can be used as a solvent, co-solvent, o/w emulsifier and stabilizer for making cement suspensions, emulsions, injections, etc., and can also be used as a water-soluble ointment base and suppository base. Solid waxy polyethylene glycol with high relative molecular weight is often used to increase the viscosity and solidification of low molecular weight liquid PEG, and to compensate for other drugs; for drugs that are not easily soluble in water, this product can be used as a carrier for solid dispersants to achieve For the purpose of solid dispersion, it is a good coating material, hydrophilic polishing material, membrane material and capsule material, plasticizer, lubricant and pill matrix, used for the preparation of tablets, pills, capsules, microcapsules, etc.