Safety and Efficacy Evaluation of CD19-UCART

Inclusion Criteria: 1. Voluntarily participating in this clinical study and signing the informed consent form; The estimated survival period is at least one month; 2. No other serious cardiopulmonary diseases, and normal liver and kidney functions (except for subjects with tumor lesions in their liver and kidneys); 3. Failure of T cell isolation during autologous CART preparation or failure of CART amplification or failure to complete apheresis or disease progression resulting in patients not benefiting from autologous CAR-T cell therapy; Or: T cell percentage in PBMC of peripheral blood ≤ 10%; Or the disease is not effectively controlled within one month after autologous CAR-T transfusion, and the patient cannot receive CAR-T transfusion again; 4. Flow cytometry within two months demonstrated positive expression of CD19 in the tumor (positive rate 50%-90%; Or biopsy ≥ 50% within 6 months; Or obtaining a biopsy again); 5. Hematological indicators: 1) WBC count ≥ 1.5× 10\^9/L; Absolute value of neutrophils ≥ 0.8× 10\^9/L; Lymphocyte count ≥0.1×10\^9/L;2) Hemoglobin ≥ 60g/L;3) Platelet count ≥20×10\^9/L; 6. Biochemical indicators (except for subjects with tumor foci in liver and kidney): Total bilirubin (TBIL)≤1.5 times the Upper Limits of Normal (ULN); AST and ALT≤1.5 \*ULN; Scr and BUN)≤1.5\*ULN; Biochemical indicators in subjects with liver and kidney invasion should meet: Total bilirubin (TBIL)≤5 \*ULN;AST and ALT≤5\*ULN; Scr and BUN ≤ 5\*ULN; 7. Cardiac function: Good hemodynamic stability, and the left ventricular ejection fraction (LVEF) ≥ 55%; 8. Serum viral EBV-DNA, CMV-DNA, HIV antibody and syphilis antibody, HBV, HCV virus quantification were all negative; 9. ECOG activity status score: 0-2 points; 10. Female subjects must have access to effective contraceptive measures (e.g., oral prescription contraceptives, injectable contraceptives, intrauterine devices, double blocking, contraceptive patches, male partner sterilizations) throughout the study period; Serum or urine pregnancy test results must be negative at screening and throughout the study; 11. Willing to comply with the rules established in this protocol; 12. Patients with relapsed/refractory CD19-positive acute B-cell leukemia (B-ALL, with the age of 1-60 years) or relapsed/refractory B-cell non-Hodgkin's lymphoma (B-NHL, with the age of 5-65 years). Exclusion Criteria: 1. Pregnant or lactating women; 2. The following drugs or treatments should be excluded:High-dose glucocorticoids were used within 72h prior to UCAR-T infusion, except for physiological alternative therapies;Allogeneic cell therapies such as donor lymphocyte transfusion within 6 weeks prior to UCAR-T transfusion;GVHD treatment; 3. Single extramedullary relapse B-ALL; 4. Suffering from severe mental disorder; 5. Active autoimmune diseases requiring immunotherapy; 6. History of other malignant tumors; 7. Patients with severe cardiovascular disease; 8. Organ function is in the following abnormalities; 9. Total bilirubin \> 1.5 times the upper limit of normal unless the patient is Gilbert's syndrome; 10. Partial thromboplastin time or activated partial thromboplastin time or international normalized ratio \>1.5\*ULN；in the absence of anticoagulant therapy; 11. There is an active infectious disease or any major infectious event requiring high-level antibiotics; 12. Any condition that, in the opinion of the investigator, may increase the subject's risk or interfere with the test results.