The invention discloses a
mechanical watch with two tourbillons, which comprises a winding
system, a drive
system, a display
system, a shifting needle system, a transmission
gear train, a differential
gear train and two tourbillon gear trains; a cover plate which is connected with a main clamping plate is adopted as a beachmark, the
mechanical watch is divided into an upper layer and a lower layer; the winding system, the drive system, the shifting needle system and a drive part of the display system are arranged on the lower layer, and the tourbillon
gear train, the transmission gear
train and a display part of the display system are arranged on the upper layer; and the upper and the lower
layers of the
mechanical watch are connected with each other through the differential gear
train into a whole. The mechanical watch has the advantages that: two identical driving gears on
barrel which are serially connected with each other are divided by two coaxial tourbillons which are horizontally arranged into an upper and a lower layer, the two driving gears on
barrel are connected with each other through a differential system which is provided with a
jewel bearing, and the size of the two driving gears on
barrel are maximized to obtain the maximum driving torque and the maximum winding length so as to provide energy to a balance and hair
spring system and to prolong the time traveling length of the
machine core. In addition, the size of an outer
balance wheel is maximized, so the rotation
inertia is increased, the time traveling precision of the watch is improved, and the time of the watch is more correct.