This study was designed to explore the safety and efficacy of Bevacizumab combined with Fluzoparib, Bevacizumab combined with chemotherapy or Fluzoparib monotherapy in patients with platinum-resistant recurrent ovarian cancer.

This purpose of this study is to explore efficacy of Bevacizumab combined with Fluzoparib, Bevacizumab combined with chemotherapy or Fluzoparib monotherapy in patients with platinum-resistant recurrent ovarian cancer.Besides the efficacy,we focus on the safety and quality of life in the new treatments.

Inclusion Criteria:

1. Age ≥18 years, female;
2. Recurrent epithelial ovarian cancer, fallopian tube cancer, or primary peritoneal cancer proven to be platinum-resistant by histology or cytology;
3. ECOG score was 0-1;
4. Expected survival time > 12 weeks;
5. Normal or abnormal bone marrow, kidney, and liver function of the patient has no clinical significance, and the specific situation will be comprehensively determined by the investigator;
6. Patients not previously treated with PARPi or targeted drugs;
7. The patient has taken effective contraceptive measures within 14 days prior to screening and is willing to sign the notification until the last medication No pregnancy plan and voluntary use of effective contraceptive measures within the next 6 months;
8. The subject or his/her legal guardian can communicate well with the investigator, understand and comply with the requirements of this study, and understand and sign the informed consent.

Exclusion Criteria:

1. Known allergy to fluzopalil or study drug components;
2. Patients with any factors affecting oral administration (such as previous gastric or small bowel resection, or current atrophic gastritis, chronic intestinal disease, gastrointestinal bleeding, dysphagia, gastrointestinal obstruction, or diarrhea greater than grade 1, including those who have recovered but have not recovered);
3. Patients who underwent major surgery or gastrointestinal surgery affecting drug absorption, open biopsy, severe traumatic injury, wound unhealed or did not recover from major surgery within 1 month before the trial;
4. Before the first administration, patients have used strong CYP3A inhibitors (such as itraconazole, telithromycin, clarithromycin, ritonavir, etc.) or medium CYP3A inhibitors (such as ciprofloxacin, erythromycin, diltiazem, fluconazole, verapamil, etc.); Patients who had used strong CYP3A inducers (e.g., phenobarbide, enzyluamide, phenytoin, rifampicin, rifambutin, rifapentine, carbamazepine, nevirapine and St. John's herb) or medium CYP3A inducers (e.g., Bosentan, efavirenz, modafinil, etc.) and did not reach 3 elimination half-lives;
5. Pregnant or lactating women or subjects who cannot use contraception as required;
6. Those who have special requirements on diet and cannot accept uniform diet;
7. As judged by the researcher, there are other circumstances that are not suitable for the researcher.