Abstract: In order to quickly and accurately calculate the quantity of auxiliary engineering of railway station yard roadbed slopes and meet the collaborative needs of different professions, this paper designed and developed a software for calculating quantity of auxiliary engineering of railway station yard roadbed slope based on .NET. This software can automatically identify and extract the plane and spatial information of railway station yard roadbed slopes from the design drawing documents, and calculate the quantity of slope auxiliary engineering through preset customization or based on the actual project situation. The output quantity result files meet the needs of professional collaboration and can be directly used for collaborative funding between professions. The application results show that this software eliminates possible errors and omissions in manual calculations, ensures the accuracy of calculation results, and has strong engineering practicality.