Access method and device of cyclic storage structure

The invention provides an access method and a device of a cyclic storage structure. The method comprises the steps of detecting the data length of a write-in and read-out cyclic storage structure; andwhen the length of the written data or the length of the read data meets a first preset condition, increasing the storage space of the cyclic storage structure. The device comprises a detection unitused for detecting the length of data written into and read from the cyclic storage structure; and the first judgment unit is used for increasing the storage space of the cyclic storage structure whenthe length of the written data or the length of the read data meets a first preset condition. According to the method and the device, when a sender suddenly and quickly sends a large amount of TCP data, the cyclic storage structure increases the storage space, so that the data can be timely received, more data packets are cached when the network flow is suddenly increased, and the packet loss rate and the error rate are re