A Multicenter, Open Label Phase I Clinical Trial Evaluating the Safety and Pharmacokinetics of TQB2252 Injection in Subjects With Advanced Malignant Tumors

Inclusion Criteria: * The subjects voluntarily joined this study, signed an informed consent form, and showed good compliance; * 18 years old ≤ 75 years old (calculated from the date of signing the informed consent form); * Electrocorticogram (ECOG) score ranges from 0 to 1 points; * Expected survival is greater than 12 weeks； * Confirmed to have at least one measurable lesion according to RECIST 1.1 (solid tumor) or Lugano 2014 (lymphoma) criteria； * Late stage malignant tumor subjects who have failed standard treatment or lack effective treatment； * Women of childbearing age should agree to use effective contraceptive measures during the study period and for 6 months after the end of the study; Men should agree to use effective contraceptive measures during the study period and for 6 months after the end of the study period. Exclusion Criteria: * Has experienced or currently has other malignant tumors within the past 5 years prior to the first use of medication; * There are multiple factors that affect diseases related to intravenous injection and venous blood collection; * The adverse reactions of previous anti-tumor treatments have not recovered to a Common Terminology Criteria for Adverse Events (CTCAE) v5.0 score of ≤ 1; * Individuals who have undergone major surgical treatment, significant traumatic injury, or are expected to undergo major surgery during the expected study treatment period within 4 weeks prior to the first use of medication; * Subjects who experience any bleeding or bleeding events ≥ CTCAE grade 3 within 4 weeks prior to the first administration; * An arterial/venous thrombotic event occurred within 6 months prior to the first administration; * Active viral hepatitis with poor control; * Active syphilis infected individuals in need of treatment; * History of active pulmonary tuberculosis, idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonia, radiation pneumonitis requiring treatment, or clinically symptomatic active pneumonia; * Individuals with a history of abuse of psychotropic drugs who are unable to quit or have mental disorders; * Diagnosed with immunodeficiency or undergoing systemic glucocorticoid therapy or any other form of immunosuppressive therapy due to a history of hepatic encephalopathy; * Previously experienced grade 3 or higher adverse reactions related to immunotherapy; * Suffering from significant cardiovascular disease; * Active or uncontrolled severe infections; * Patients with renal failure requiring hemodialysis or peritoneal dialysis; * History of immunodeficiency, including HIV positivity or other acquired or congenital immunodeficiency diseases; * Individuals with epilepsy who require treatment; * Previously received treatment with similar anti-lag3 drugs.