A method of establishing a general simulation material parameter library is disclosed to solve the problem that the simulation material parameter libraries for different fields vary greatly and need to be managed in a decentralized way. A general simulation material parameter library is designed, and the parameter library comprises various material parameters needed in the technology simulation processes of casting, welding, heat treatment and other material molding fields and can provide accurate and complete material parameters for the simulation processes of various fields, such as liquidus temperature, solidus temperature, thermal conductivity, expansion coefficient, density, specific heat, enthalpy, strain hardening, Young's modulus, yield strength, Poisson's ratio and CCT curve of materials. The database comprises the simulation application conditions of all fields of material molding. Simulation personnel only need to call a unified material database in the process of simulation, and the result of each material parameter optimization is stored in a general material database. The overall simulation parameter value of a material can be optimized effectively. A general simulation material parameter library is provided for the enterprise's material molding simulation technology.