The invention discloses a bionic tracheal stent mounted in a trachea. The bionic tracheal stent comprises a stent body. The portion, corresponding to a cricothyroid membrane of the trachea, of the stent body is of a non-closed structure. The bionic tracheal stent has the advantages that the non-closed structure is arranged at the portion, corresponding to the cricothyroid membrane of the trachea of a human body, of the stent body, an arc-shaped structure made of a soft material is produced or two ends of the stent body extend in a staggered mode to enable the tracheal stent to form a helical structure, and the arc-shaped structure or the helical stent bends towards the interior of the stent body to reduce stress effect when the trachea is squeezed to contract, so that diameter change of the tracheal stent is limited, fatigue breakage of the stent due to stress contraction is reduced, and service life of the tracheal stent is prolonged.