This paper introduces the design idea of steel grid(shell) structure clinker silo roof combining bolt sphere joints and welded sphere joints, uses MST and 3D3S software to design and calculate the grid structure, and establishes an overall steel structure model. After reverification, the strength of welded sphere joints meets the requirements of the specification. The grid structure system combining welded sphere and bolt sphere joints is used, and the support circumferential members do not need to use large diameter bolts, which reduces the construction difficulty and saves the construction materials and construction costs.