The invention discloses a method for storing surveillance video data, comprising the following steps of: creating a file with a fixed size in a general file system of a storage server; writing file status data and a file identifier at the head of each file; searching for a free file according to the file identifier when the storage server starts to execute a video recording function; receiving surveillance video data from a network by the storage server; dividing the surveillance video into block data and writing the block data and description information thereof in the free file, and updating the file status data and the file identifier. By adopting the technical scheme, the concurrent processing capacity of the storage server is obviously improved and the use cost of the system deployment and the utilization of a network video surveillance system are reduced.