This is a multicenter, randomized, open-label, 2-arm Phase 2 study to evaluate the efficacy and safety of Fluzoparib with Apatinib versus Fluzoparib alone, as treatment, in relapsed ovarian cancer patients. The study contains a Safety Lead-in Phase in which the safety and tolerability of Fluzoparib+Apatinib will be assessed prior to the Phase 2 portion of the study.

Inclusion Criteria:

1. Histologically diagnosed high-grade serous or endometrioid recurrent ovarian,fallopian tube,or peritoneal cancer.
2. Patients must have received at least 2 previous platinum-containing regimens.
3. At least one target lesion.
4. ECOG performance status 0-1.
5. Adequate bone marrow, kidney and liver function.

Exclusion Criteria:

1. Prior treatment with a poly (ADP-ribose) polymerase (PARP) inhibitor or Apatinib.For exploratory cohort ，patients who received PARP inhibitor are eligible;
2. Prior malignancy unless curatively treated and disease-free for > 5 years prior to study entry. Prior adequately treated non-melanoma skin cancer, in situ cancer of the cervix allowed;
3. Radiation or anti-hormonal therapy or anticancer therapy within 14 days before first administration;
4. Known to be human immunodeficiency virus positive;
5. Known active hepatitis C virus, or known active hepatitis B virus;
6. Untreated and/or uncontrolled brain metastases;
7. Patients with clinical symptoms of cancer ascites, pleural effusion, who need to drainage, or who have undergone ascites drainage within 3 months prior to the first administration;
8. Pregnant or breast-feeding women.