The present invention provides a method and a computation node for processing application data. The method includes: starting, by an operating system, a service process; establishing, by the operating system, a socket connection between the service process and backup software, where the service process has a root operation right, and the service process and the backup software have the same user identifier; sending, by the backup software through the socket, a processing request for application data; receiving, by the service process through the socket, the processing request for application data, where the processing request is sent by the backup software, sending the processing request for application data to corresponding application software, receiving application data returned by the corresponding application software, and sending the returned application data to the backup software through the socket.