Image recognition-based behavior recognition is an active research field in computer vision. With the modernization of animal husbandry in China, innovative technologies such as machine vision and artificial intelligence are gradually applied to pig monitoring, which can realize real-time abnormal behavior of pigs, and pig behavior analysis. Pig behavioral identification, detection of image sequences containing pigs, framing, target classification, anomaly detection, and behavioral analysis and identification of pigs. Based on the individual behavior recognition of pigs, this paper introduces the research and development status of pig her identification in recent years and the challenges faced by the current research direction, and makes a brief summary.