The invention discloses a deepwater drilling guide tube. The deepwater drilling guide tube comprises a guide tube post, wherein the guide tube post comprises a plurality of guide tubes, and every twoadjacent guide tubes are connected through a guide tube collar; body mounting base plates and lifting lug mounting base plates which are matched with the body mounting base plates in a detachable connecting mode are arranged on the side wall of each guide tube, and the at least two body mounting base plates or lifting lug mounting base plates are uniformly distributed on the side wall of the guidetube in the peripheral direction; the body mounting base plates of every two adjacent guide tubes are aligned in the axial direction of the guide post, and are linearly distributed; and the guide tube post is provided with an upper end and a lower end which are opposite, wherein the lower end of the guide tube post is equipped with guide tube shoes, lifting lug base plate guide shoes are arrangedon the guide tube shoes, and the lifting lug base plate guide shoes and the body mounting base plates are aligned in the axial direction of the guide post. The deepwater drilling guide tube providedby the invention can save occupied time of a drilling table, and improves drilling efficiency and drilling perpendicularity.