Small precise leveling device

The invention provides a small precise leveling device which comprises a supporting platform, wherein the supporting platform and a main adjusting screw are in threaded connection; the end part of the upper end of the main adjusting screw extends out of and leans against the upper surface of the supporting platform and is connected with a spherical hinge support; the lower end of the main adjusting screw extends out of the lower surface of the supporting platform and is in threaded connection with a big bevel gear; the big bevel gear and a small bevel gear are meshed; the side part of the small bevel gear is connected with a hand wheel by a driving shaft; the bottom of the big bevel gear is connected with a spring pre-tightening assembly; and a thread pair at the end part of the lower endof the main adjusting screw is connected with a main locking assembly. Through adoption of the small precise leveling device, a part can be quickly leveled under a heavy load working condition. The small precise leveling device is also suitable for leveling under an asymmetric load condition. The small precise leveling device has a simple and artful structure, is flexible and convenient to regulate, can be used in group and is convenient to level a large plane.