Abstract: Multimodal journey planning is an important part of operation technologies for China's intelligent high-speed railway 2.0 , and is a key technical means to promote the high-quality development of passenger service and the integrated development of multimodal transportation. Based on the advanced experience of journey planning in multimodal transportation abroad, combined with the practices of China railway ticketing and reservation system in multimodal transport, this paper proposes the framework of multi-mode trip planning method based on the intelligent MaaS+ platform of the system, which is divided into three stages: data collection, data processing and journey optimization, and makes full use of the existing route calculation schemes of different transportations to realize dynamic multimodal journey planning. Subsequently, this method will continue to be iteratively optimized to generate a simple and efficient multi-mode path set so that the multi-mode path scheme recommended by the platform is more close to the actual travel needs of passengers.