The invention provides a drainage, puncture and positioning device for the
cardiothoracic surgery. The device comprises a fixed sleeve, telescopic movable brackets, a fixing
assembly and automatic supporting assemblies, wherein the fixing
assembly and the fixed sleeve are rotationally connected through a rotating
assembly, each telescopic movable bracket comprises a support I and a support II, thefixed sleeve and the support I are rotationally connected through a rotating assembly, one end, away from the fixed sleeve, of the support II is rotationally connected with the fixing assembly through a universal
ball joint, and a plurality of automatic supporting assemblies are arranged on the fixing assembly in a matched manner. According to the four telescopic movable brackets, the inclinationdegree of the fixed sleeve can be adjusted by adjusting length of each telescopic movable bracket, and puncture demands of different parts in the
thoracic cavity are met; and with adoption of the fixing assembly, air in a fixing rod is discharged by a push rod, so that the fixing rod is tightly adsorbed on the
skin surface, adsorption and fixing functions are realized, the device can keep unchanged at a correct needle inserting point, a correct needle inserting angle and a correct needle inserting depth, and the inserted puncture needle is continuously fixed.