The metacognitive model of obsessive-compulsive disorder(OCD) emphasizes that metacognitive beliefs are a key factor in OCD pathology. OCD patients have a series of metacognitive problems, such as incorrect metacognitive knowledge beliefs, negative metacognitive experiences and inappropriate use of metacognitive strategies. Metacognitive therapy for OCD has a good treatment efficacy in the individual intervention and group intervention study, with a focus on the importance of thinking processes(such as self-focused attention, perseverative thinking styles of worry, attention strategies of threat monitoring and so on) rather than the content of thoughts. Future research should examine the memory and other metacognitive characteristics for OCD from the perspectives of cognitive neuroscience and replicate and extend metacognitive model of OCD.