Objective · To explore the clinical characteristics of the obsessive-compulsive disorder (OCD) patients with hoarding symptoms and analyze the risk factors related to hoarding symptoms. Methods · A total of 247 OCD patients and 137 healthy controls (HC) were enrolled. The OCD patients were divided into hoarding group and non-hoarding group according to hoarding symptoms. Yale-Brown Obsessive-Compulsive Scale, Hamilton Depression Scale, Hamilton Anxiety Scale, Neuroticism Extraversion Openness Five-Factor Inventory and Obsessive Belief Questionnaire-44 were used to measure the severity of OCD, levels of depression and anxiety, personality characteristics and obsessive-compulsive beliefs of the three groups. The differences among the groups were compared, and Logistic regression was used to analyze the related factors of hoarding symptoms. Results · Regardless of hoarding symptoms, the scores of depression, anxiety, neuroticism and obsessive beliefs in the patients with OCD were significantly higher than those in the healthy controls (all P=0.000). Compared with OCD/non-hoarding group, OCD/hoarding group had a significantly lower level of extroversion (P=0.000), a significantly higher level of perfectionism/certainty (P=0.037), and higher scores in indecisiveness (P=0.003), pathological responsibility (P=0.006) and pathological slowness (P=0.000). There was statistical significance in age (OR=0.94), extraversion score (OR=0.89) and pathological retardation score (OR=2.50) in Logistic regression model (all P<0.05). Conclusion · The risk of hoarding symptoms in the OCD patients decreases with the increase of age and extroversion level, and increases with the increase of pathological retardation level.