Data exchange method and device based on API

The invention relates to the technical field of data exchange, in particular to a data exchange method and device based on an API. The device comprises a dictionary generation module, a user login module, an authority authentication module, a request receiving module, an interface management module, a data exchange module and a storage server; the method comprises the following steps: entering a visual page to check a data dictionary, sending a data exchange request through the visual page, processing the data exchange request after the request receiving module receives the data exchange request, sending the processed information to the interface management module, generating an API interface by the interface management module according to the received information, and sending the API interface to a user. A user accesses a corresponding database through the API interface, the corresponding API interface can be produced according to specifications through data exchange, secondary development is not needed, uni