In order to optimize patent services, the current situation and trend of global construction machinery patents were deeply analyzed, and the relationship between technological innovation and market demand was revealed. Based on the incoPa patent database, the patent data of global construction machinery since 1914 was searched. After denoising and cleaning the search results, the patent information of global construction machinery industry was analyzed from the aspects of application trend, regional market layout, technology flow, patent family number and its technical value, and the situation of foreign patent application in China. It is found that the number of patent applications for construction machinery in the world tends to increase steadily. Technological innovation and market demand promote the technological breakthrough of global construction machinery. China and Japan have obvious advantages, and Japan leads in the number of simple family patents.Enterprises with advanced patent technology of construction machinery in various countries have gradually realized their layout in various regions of the world. In the future, China needs to strengthen investment in high-end technology R&D, enhance innovation ability and deepen international cooperation, so as to boost technological innovation and rapid development of construction machinery industry.