The invention discloses a fast intercepting engine for obtaining traffic environment information by a driving simulator. A positioning service module is connected with an intercepted simulation object data storage space; the intercepted simulation object data storage space is connected with a simulation object positioning algorithm module and a simulation range interception algorithm module; the simulation object positioning algorithm module is connected with a simulation scene space division module; the simulation scene space division module is connected with the simulation range intercepting algorithm module; the simulation range interception algorithm module is connected with an interception service module; the interception service module is connected with a simulator sub system data storage space; the simulator sub system data storage space is connected with the simulation range interception algorithm module; an intercepted simulation object is connected with the positioning service module; each sub system of the driving simulator is connected with the interception service module. The traffic simulation vehicles around the vehicle represented by the driving simulator can be accurately intercepted in real time, and simple and effective data is provided for the calculation of a driving simulator interactive system.