Abstract: Developing the railway signal integrated design platform based on database is one of the methods to solve problems in current aided design software. Through analyzing the information characteristics of railway signal engineering drawings, this article proposed the design principle and data flow model for the basic database of indoor and outdoor signal engineering, set up the relational database of railway signal engineering by using database technology such as defining a foreign key, etc. The platform was established based on the database design scheme, and applied in the railway signal engineering design.