This is a non-randomized, uncontrolled, multicenter real-world study. The total number of subjects is 200. The objective is to observe and evaluate the efficacy and safety of Trifluridine/Tipiracil alone or in combination with other therapies in the treatment of metastatic colorectal cancer in real-world environment. The primary endpoints is Progression-free survival (PFS). Secondary endpoints are overall survival (OS), Objective response rate(ORR), Disease control rate(DCR), progression-free survival (PFS), and Quality of life (QoL).