The present invention relates to a light steel sealed column framework construction system which is composed of light steel framework load bearing system, a building roof system and an inside and outside maintenance structure system. It is characterized in that the framework load bearing system is composed of light steel frame column; the building roof system is composed of a disassembling-free moulding board aligned with the top surface of the framework beam and the reinforced concrete poured on the disassembling-free moulding board, and also can adopt prefabricated light floor; the roof system is composed of a light thermal water proof plate fixed on the framework beam or light steel purlin; the outside wall maintenance structure system is composed of a wall beam-light board fixed on the framework column; the inside wall maintenance structure system is composed of light board or light steel keel thin plate. The invention has the advantage of light weight, good shock resistance, highindustrialization extent, simple and clear in structure drive, reliable and mature in calculation and short in construction cycle, and can be broadly adapted for various small high layer buildings and especially adapted for industrialization domestic architecture.