Abstract: This article takes an optical component base as an example to study the indoor path planning technology based on the BIM model. First, establish a BIM parameterized model of the building, and form the basic indoor road network through lightweight conversion, model analysis, floor decomposition, and triangular grid division. On this basis, the traditional path planning algorithm is optimized to achieve multiple floors and obstacles. Based on HTML5/WebGL technology, the three-dimensional visual display of the roaming path is displayed on the Web browser to provide scene support for the operation and maintenance business, therefore,which is intuitive and practical.