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Chimeric antigen receptor T‐cell (CAR‐T) therapy is becoming an effective technique for the treatment of patients with relapsed/refractory hematologic malignancies. After analyzing patients with tumor progression and sustained remission after CAR‐T cell therapy, many factors were found to be associated with the efficacy of CAR‐T therapy. This paper reviews the factors affecting the effect of CAR‐T such as tumor characteristics, tumor microenvironment and immune function of patients, CAR‐T cell structure, construction method and in vivo expansion values, lymphodepletion chemotherapy, and previous treatment, and provides a preliminary outlook on the corresponding therapeutic strategies. [ABSTRACT FROM AUTHOR]