This is a study to evaluate the safety and efficacy of TQ-B3525 tablets in patients with relapsed / refractory mantle cell lymphoma (MCL).

Inclusion Criteria:

• 1. Understood and signed an informed consent form; 2. Eastern Cooperative Oncology Group (ECOG) performance status score of 0 to 2; Life expectancy ≥ 3 months; 3. Relapsed / refractory MCL; 4. Has received at least one-line and less than four lines of previous treatment, the latest treatment confirmed no objective response, or disease progress after treatment; 5. Has at least one measurable lesion; 6. Adequate organ system function; 7. Male or female subjects should agree to use an adequate method of contraception starting with the first dose of study therapy through 6 months after the last dose of study (such as intrauterine devices , contraceptives or condoms) ；No pregnant or breastfeeding women, and a negative pregnancy test are received within 7 days before the first administration.

Exclusion Criteria:

• 1. Has central nervous system violation; 2. Has received other PI3K inhibitors; 3. Has diagnosed and/or treated additional malignancy within 3 years prior to the first administration; 4. Has history of interstitial lung disease; 5. Has a history of immunodeficiency diseases; 6. Has multiple factors affecting oral medication; 7. Has adverse events caused by previous therapy except alopecia that did not recover to ≤grade 1; 8. Has received systemic steroid treatment within 7 days before the first administration; 9. Has received other systemic anti-tumor medications within 4 weeks before the first administration, or still within the 5 half-life of the medication, which occurs first; 10. Has palliative radiation therapy within 4 weeks before the first administration; 11. Has active infections within 4 weeks before the first administration; 12. Has received surgery, or unhealed wounds within 4 weeks before the first administration; 13. Has a history of autologous hematopoietic stem cell transplant within 6 months or allogeneic hematopoietic stem cell transplant; 14. QTCF > 480ms, LVEF < 50%; 15. Urinary protein ≥ 2 +, and urinary protein quantity >1.0 g in 24 hours within 7 days; 16. Has active hepatitis B or C; 17. Has psychotropic substances abuse or a mental disorder; 18. Has other conditions that make it inappropriate for the patient to be enrolled based on investigator's opinion.