Abstract: In response to the current situation of safety risks and quality issues in the installation and disassembly of gantry frames, a bolt connected prefabricated gantry frame is proposed based on the principle of bolt connection. The installation and disassembly of prefabricated gantry frames connected by bolts are flexible, convenient, and fast. No need to make tedious construction preparations in advance, no need to perform electrical welding, and reduce exhaust emissions. There is no hot work during the installation and disassembly process. Reduce safety risks such as fire prevention and electric shock on site. After removal, the profile will not be damaged and can be reinstalled according to the original design position. Low turnover and usage costs. It can solve the problem of requiring longer vehicles for gantry transportation. The walking guide beam can be divided into two parts through bolt connection, and can be transported using ordinary vehicles. Establish a model using PKPM software and complete structural calculations. All indicators meet the standard requirements. Currently, it has been applied on site in two projects.