Some ovarian cancer patients may have obvious toxic side effects after chemotherapy, including gastrointestinal reactions, bone marrow suppression and damage to liver and kidney functions. Clinically, when these toxic reactions occur after chemotherapy, corresponding treatment is needed, such as anti-vomiting and appetite promotion treatment for gastrointestinal reactions, and whitening treatment for bone marrow suppression. If the patient relapses after chemotherapy, the patient should be treated again by knowing the type of chemotherapy drugs used before and the time of relapse. If the relapse occurs after six months, the first-line chemotherapy drugs can be continued; if the relapse occurs within six months after chemotherapy, the chemotherapy drugs should be adjusted and the treatment plan should be changed.