Telmisartan,an antihypertensive drug,occupies an important position in the management of hypertension due to its advantages of stable blood pressure control and long-term effect.In this paper,according to the synthesis order of the original route,the telmisartan molecule is divided into three blocks,and the synthesis method of each block is classified and summarized with the synthesis of blocks as the goal,and a mind map is attached,aiming to clarify the raw materials,synthesis pathways and final products of the existing routes,so as to facilitate the design and selection of subsequent synthesis routes.