Abstract: At present，farmers usually take seed treatment before sowing used by selection，drying，soaking，dressing and germination.After these processing，there is really good performance on improving seed germination rate，keeping seedling uniform and prevention of plant diseases and insect pests.However，there is also a disadvantage on destruction of soil environment and limit of future development.With the development of modern science and technology，research and application on physical technology seed treatment begin to develop，such as electrical，thermal and mechanical.A new agricultural technology emerges as the times required which could encourage plant growth and development by physical method.According to seed physical characteristics of the electrical，thermal and mechanical，effect of physical technology seed treatment before sowing was expounded，future and policy advises of this technology development on seed industry were summed up.