Abstract: Bridge inspection platform is a kind of special equipment used to carry bridge inspection and maintenance equipment. In view of engineering's special inspection requirements of portable, modular, general purpose for small/medium sized concrete road bridge, a large-span inspection platform structure with the features of quick on-site module assembly and easy flip are designed. Then the mechanical analysis and finite element simulation verification at the key cantilever components are carried out. The platform not only has a light-weight structure and small deflection, but also it can better meet the engineering requirements of portability and versatility for the bridge inspection platform.