Data feature extraction method and device

The invention discloses a data feature extraction method and device. The method comprises the following steps: acquiring N target data packets from a data transmission tunnel; the N target data packets form a data stream according to the tetrad information of each target data packet, and the tetrad information at least comprises network address information and data port information corresponding to each target data packet; according to the obtaining time of each target data packet, data packet filtering operation is carried out on the data stream to obtain a target data stream, the target data stream comprises Q target data packets, and Q is smaller than or equal to N; and multiple data features are extracted based on the target data stream, and the data features are used for determining whether the data transmission tunnel is abnormal when transmitting the data packet. The technical problem of low data stream feature extraction efficiency in the prior art is solved. 本申请公开了一种数据特征提取方法及装置。其中，该方法包括：从数据传输隧道中获取N个目