The invention relates to the technical field of medical apparatus and instruments, and discloses a movable
thoracic cavity drainage device for
oncology surgery, which comprises two support frames, the opposite sides of the two support frames are rotatably connected with connecting rods through hinges, and the tops of the two connecting rods are fixedly provided with two first rotating blocks; the multiple first rotating blocks are rotationally connected through a first round rod, the outer side of the first round rod is sleeved with a first
torsion spring, the two ends of the first
torsion spring abut against the tops of the two connecting rods correspondingly, and a round hole is formed in a rear vertical rod of the supporting frame; a sliding plate, a fixing cylinder, a rotating cylinder, a second rotating rod, a second round block, a third storage hole, a fourth spring, a second clamping block, a fifth pull
rope and a
rope loop are arranged, so that a drainage
bottle is placed in a containing
barrel, more and more hydrops exist in the chest, the drainage
bottle presses the sliding plate downwards, the sliding plate pulls the second rotating rod to rotate through the fifth pull
rope, and the second rotating rod drives the second round block to rotate.