The utility model discloses a centrifuge robot tool quick change system, including Z to slider, miniature electrical slip ring, torque motors and elasticity steel ball locking device, torque motors passes through support fixed mounting on Z is to the slider, and it has the quill shaft to run through in the torque motors, and the quill shaft is fixed as an organic whole with torque motors's rotor, miniature electrical slip ring is fixed in torque motors's top, and quill shaft both ends rotor and elasticity steel ball locking device with miniature electrical slip ring respectively are fixed, the support mounting has the bearing that is used for supporting the quill shaft, quill shaft, torque motors's rotor and elasticity steel ball locking device pass through flange dish fixed connection and are in the same place, elasticity steel ball locking device includes quick plug and endotheca, on quick plug is fixed in the ring flange, during quick plug's lower signal end passes ring flange to endotheca, communicates with each other inside quick plug's last signal end and the quill shaft. The utility model discloses the pipeline that can make centrifuge robot tool end directly not link with the upper end, free rotation that can not restriction instrument end.