The invention discloses a measuring device suitable for micro moments of various motors. The measuring device comprises a base, and a moment measuring part, a chuck supporting part, a to-be-measured motor part and a
tail end supporting part which are arranged on the base, wherein one end of a moment
measuring instrument is connected with a load, and the other end is connected with a first
coupling; a three-jaw chuck supporting base is mounted on the base, a three-jaw chuck is mounted on the three-jaw chuck supporting base, a first connecting shaft is mounted on the three-jaw chuck supporting base, one end of the first connecting shaft is connected with the first
coupling, the other end of the first connecting shaft and one end of a second connecting shaft are connected with limiting sliding blocks via limiting grooves, a motor to be measured is connected with one end of the second connecting shaft through a second
coupling, the motor to be measured is connected with one end of a supporting connecting shaft through a third coupling, and a
stator of the motor to be measured is mounted on the three-jaw chuck by means of a jaw; and the other end of the supporting connecting shaft is mounted on a supporting plate, and the supporting plate is mounted on the base. The device provided by the invention is suitable for measuring the micro moments of various motors, and avoids the design work of supporting platforms for motors with different outer diameters.