Double-rotating-shaft hinge

The invention relates to the technical field of passive drive hinges, in particular to a double-rotating-shaft hinge which comprises a hinge body and rotating supports rotationally arranged on the two corresponding sides of the hinge body, and the rotating supports comprise the first rotating support and the second rotating support. One end of the first rotating support is rotationally connected with the hinge body through a first rotating shaft, and the other end of the first rotating support is rotationally connected with the hinge body through a second rotating shaft. One end of the second rotating bracket is rotationally connected with one end of the hinge body through a third rotating shaft, and the other end of the second rotating bracket is rotationally connected with the other end of the hinge body through a fourth rotating shaft; large torque output is achieved in a small space range through the boosting gear train connected between the driving device and the driven gear, meanwhile, torque output tim