The invention discloses a file access request processing method, which is based on ganesha-nfs business process implementation, the number of requests processed can be initialized at the beginning ofthe processing cycle, After receiving the file access request sent by the current nfs client, it is judged whether the number of processed requests in the current processing cycle reaches the preset threshold, and if so, the file access request is discarded; otherwise, the file access request is added to the request processing queue and the number of processed requests is updated. Therefore, the method can limit the number of file access requests handled by the server in a processing cycle, avoid the system crash caused by processing a large number of file access requests centrally in a certain period of time, limit a large number of malicious file access requests, and improve the security. In addition, the invention also provides a file access request processing device, an nfs server, andan nfs system, which function corresponds to the above method.