Love of cleanliness, hygiene, is a good habit, but a normal behavior repeated too many times, so as to affect the work, affect the normal life, affect the normal interpersonal communication, then this normal behavior has become a problem behavior. Obsessive-compulsive disorder (OCD) is a kind of neurosis with special symptoms, which is dominated by obsessive concepts, obsessive behaviors and obsessive emotions. Its performance varies, for example, there is an engineer every night before going to bed must wear the same pajamas, and from the bedroom doorway to walk five steps to the bed, after going to bed to the bed shoes under the bed neatly, and then turn off the lights and go to bed, if the order of the above actions are wrong, or missed which one, he will do it again until it is done right. Once the unit temporarily decided to let him go on a business trip, because he didn’t have time to bring the pajamas he wore every day, he had difficulty falling asleep for several days, which is a forced ritual. Some people are always worried that the doors and windows of their homes are not closed, and when they leave their homes, they check countless times whether the doors and windows have been closed, and they are even often late for work or delay important appointments for the sake of this, which is a compulsive action. The cause of OCD is related to the person’s personality and life experiences. Most of the patients can point out the unexpected events that happened before their symptoms intensified, such as the death of their relatives, parents’ divorce, family conflicts, etc.. Psychological tension and emotional fluctuations caused by the above reasons can be a trigger for obsessive-compulsive disorder. The character traits of the patient also play an important role in the development of the disease. According to research, most patients have special character traits: most young patients love cleanliness very much, they are obedient in personality and conscientious in doing things; adult patients generally have a strong sense of time, abide by the discipline and system, are overly cautious and indecisive, are excessively strict with themselves, and care a lot about other people’s opinion of themselves. In addition, scientists believe that people who were subjected to strict parental control in childhood and were unable to express their personal feelings of joy and sadness in a timely manner are also prone to developing obsessive-compulsive disorder (OCD). These children don’t have enough free space and are controlled by their parents everywhere, so it causes psychological depression, plus they can’t find friends to talk to, and eventually become depressed and lost. In order to give vent to the pain buried in their hearts, they then choose practices such as constantly tidying up their rooms. If this habit is maintained throughout their growing up years, then a cleanliness fetish is formed. Once a child develops a cleanliness fetish, when faced with frustration, he or she will not seek help from anyone, including parents, but will bear the pressure alone, often busy at home, or washing clothes, or wiping things in the house again and again, as a way to get rid of the worries in his or her heart. Cognitive behavioral therapy, psychoanalytic psychotherapy, Morita therapy and anti-anxiety and antidepressant medication are often used to treat OCD. Doctors and patients use joint analysis and discussion, self-psychological liberation, self-unwinding, tapping the potential of the method, to find out the intervention, most people can get some degree of improvement.