Molding process of modified sodium silicate and molding sand line treatment provide shake-out, sand breaker, baking regeneration, micron separation, temperature control, automatic conveying, dust removal and all fully automatic control. Process is advanced, reliable, rational, uninterrupted and concise; this system is also ensuring safty production and clean environment, improve quality of casting, decrease gas porosity and cracks, increase automatic productivity, satisfy both the environmental protection and process requirements. This system can handle 15 Ton/HR molding sand capacity, sand reusability can be 85%, it is deemed as green environmental protection process.