A drainage tube capable of continuous perfusion, comprising a tube body (10) and a rear cannula that is communicated with the tube body (10) and located at the rear end of the tube body (10), wherein a drainage cavity (11) and a perfusion cavity (12) isolated from each other are provided in the tube body (10) along the length direction thereof； the rear cannula comprises a first branch tube (20) that is communicated with the drainage cavity (11), and a second branch tube (30) that is communicated with the perfusion cavity (12)； the front end of the tube body (10) is provided with multiple liquid outlets (40) that are communicated with the perfusion cavity (12)； the side wall of the tube body (10) is further provided with a drainage opening (13) that is communicated with the drainage cavity (11)； a distance exists between the drainage opening (13) and the multiple liquid outlets (40). In the present invention, compared with the drainage tube having a single tube and multiple sub tubes in the prior art, the drainage cavity (11) and the perfusion cavity (12) isolated from each other are provided in the tube body (10) so as to achieve independent drainage and perfusion； under the condition of an equivalent diameter, a larger drainage cavity (11) can be provided, and thus, a drainage rate is improved, and the risk of blocking the tube is reduced； the drainage opening (13) is provided at a position having a certain distance from the liquid outlet (40), so that a drug is continuously perfused and fully reacts with hematoma, and it helps to exert the efficacy of the drug.Tube de drainage capable de perfusion continue, comprenant un corps (10) de tube et une canule arrière qui est en communication avec le corps (10) de tube et située au niveau de l'extrémité arrière du corps (10) de tube, une cavité de drainage (11) et une cavité de perfusion (12) isolées l'une de l'autre sont disposées dans le corps (10) de tube dans la direction de la longueur de celui-ci； la canule arrièr
