Pets are no longer animals, but family members. Once a pet passes away unexpectedly, the owner may also suffer from traumatic stress disorder. One such patient was recently seen, who spent the whole day in tears because of the loss of her beloved dog, and after psychotherapy and cognitive therapy, the patient has now been discharged. Grandmother Wang is 65 years old and her golden retriever, which she had kept for 8 years, suddenly died of an acute illness, so she was devastated and washed her face with tears almost every day. The family thought that after a period of time, the old man’s mood would improve, but after more than half a year, the old man’s state remained the same, and he was not interested in anything and found life meaningless. The family had to bring the old man to the psychological clinic of CUH for help, and was diagnosed with depression. Pets have taken up a very important place in the emotional life of urban people, and have become a spiritual dependence for the elderly to fill their loneliness and isolation, and their perception of pets is no longer simply an animal, but an irreplaceable and important member of the family. Especially for some lonely elderly people who have no relatives to rely on, but there is also a certain character basis. Grandma Wang’s family is well-off, and her children and partner have been very good to her, and it has always been others who have cared for her. After the golden retriever dog came into her life, she treated it as an object she could pamper and care for, saw the dog as a substitute for emotional giving, put in her feelings and enjoyed them, neglected her emotional concern for her family, and her family’s overprotection also made her more flooded with her own emotional investment in the dog. So when the accident occurred, her excessive emotional attachment to her dog made it difficult for her to accept the truth, resulting in a sudden emotional trauma and a traumatic stress reaction. Generally speaking, traumatic stress disorder will heal on its own after a period of time, but without good guidance and intervention, it may lead to depression, such as insomnia, anxiety, fidgeting, and depressive states. Clinical reminders, when an unexpected event occurs, encouragement and support from family members are very important, and timely companionship and emotional comfort can help patients to calm down. At the same time, the patient should be completely isolated from the clues of the mourning event, such as changing the environment, or going out for a trip and participating in other social activities to avoid re-experiencing the traumatic event. Family members should also pay attention to mobilize the participation of family members, form a good, interactive and open interaction environment, take the initiative to assume the responsibility of family emotional communication, and bring into play the initiative of each person to create a healthy, positive and upward family atmosphere. Once mood changes, insomnia, anxiety, depression and other adverse emotions occur and last for a long time, it is important to seek timely medical consultation and standardized and comprehensive treatment with the help of professional psychologists.