The invention discloses a universal data access method of a cross-platform multi-heterogeneous database in a scheduling data service platform, which comprises the following steps of: configuring data sources: connecting all data sources according to the configuration information, and creating a connecting environment of corresponding databases; defining a uniform database access model: describingall data request results by using a uniform model, realizing uniform modeling on list structures and list records of privates representations in various commercial databases; packaging database access interfaces; and providing a universal data access method for applications by universal database access services, and distributing data access requests of the applications. The invention provides theuniversal database access method which has the characteristics of high speed, flexible configuration, cross platform, and the like; one set of source codes can be used in a plurality of platforms, and one application can freely and simultaneously access various commercial database; meanwhile, the invention provides guarantee for rapid development of scheduling upper layer service application of data service platforms.