The invention belongs to the technical field of open service interface generation, and discloses a method for quickly generating an API service interface, an open platform, a terminal and a medium, and the method for quickly generating the API service interface comprises the steps of establishing an interface menu, adding an interface, adding interface parameters, adding an interface step, generating an interface address and transmitting the interface address. The open platform for quickly generating the API service interface comprises an interface menu establishing module, an interface adding module, an interface address automatic generating module and an access interface docking module. The method is not limited by calling of a front-end framework, and flexible calling of a market mainstream front-end framework is supported; data interface generation is flexible and diversified, and interface data generation of mainstream databases can be met; infinite expansion and addition can be realized; code development is avoided, operation can be carried out without technicians, and rapidness, safety and accuracy of data docking are improved; the time cost of workers is reduced, the working efficiency is improved, and meanwhile the replicability of data connection can be achieved.