Abstract: There are many drawbacks in the present modeling of the grid structure in Revit.Due to the excessive number of components, the conventional modeling is heavy in workload and difficult in to check the errors and to modify them. Applying the volume modeling can be in speed, but the overall model is not accurate enough, and the component parameters cannot be set separately.In order to improve the design efficiency and the modeling accuracy, this paper uses Microsoft's visual studio 2015 development platform for a secondary development of Revit to prepare a grid automation modeling program.This program can generate the Revit model of the welded spherical joints grid quickly, easily and accurately, through reading the LOG text to load the welded hollow sphere joint family and the member family.This program is suitable for the non-curved standard grid of welded spherical joints.The generated grid structure can be modified by the size of the corresponding components according to the LOG text.The overall size of the grid structure is in accordance with the actual situation, which greatly reduces the workload of the design staff.