The utility mode discloses an in-vivo hydrops extractor, which comprises a collecting bottle (1), an injector (3), a liquid inlet tube (4) and a three-way tube (5), wherein a sealing plug (2) is arranged at the bottleneck of the collecting bottle (1); the three-way tube (5) comprises a branch end a (10), a branch end b (11) and a branch end c (12); the branch end b (11) is connected with the injector (3) by a hose; the branch end c (12) is inserted into the collecting bottle (1) by the sealing plug (2); and one end of the liquid inlet tube (4) is inserted into the collecting bottle (1) by the sealing plug (2), and the other end of the liquid inlet tube (4) is connected with a puncture needle (7) by the hose. The in-vivo hydrops extractor is simple in structure, easy to move and convenient to operate, and can extract hydrops continuously without the pull-out of the puncture needle, so that extra harm caused by the pull-out and insertion of the puncture needle to patients is avoided; and the injector is separated from the liquid inlet tube, so that the hydrops is not splashed, environment is protected, and the service life of the injector is prolonged.