TT-232 TFA (CAP-232 TFA) is an analogue of somatostatin. TT-232 TFA can induce apoptosis of pancreatic tumor cell lines, inhibit tyrosine kinase activity and stimulate tyrosine phosphatase activity in colon tumor cell lines. TT-232 TFA inhibits the proliferation of tumor cells, induces apoptosis of tumor cells and shows strong anti-tumor effects. TT-232 TFA can be used in the development of anti-tumor drugs and the study of apoptosis mechanism.