The metastasis of tumour cell can affect the prognosis of patients,the genesis of micro-lymphatic vessel has significance for the tumor lymphatic metastasis.Studys showed that the key in the study of tumor micro-lymphatic metastasis is to discriminate Micro-lymphatic vessel and micrangium,while lymphatic vessel plays an important role in tumor metastasis.Now therapy of inhibiting the formation of micro-lymphatic vessel or by lymphatic vessel can be a new therapeutic target in tumor treatment or not still needs further studying,this article reviews data related to this question.