The invention relates to a precision instrument device buffering and shock absorbing transport semitrailer.Through mutual cooperation and complement of three
layers of buffering and shock absorbing, buffering and shockabsorbing of a precision instrument device are completed from different angles taking into account particular emphasis, a first layer of bufferingand shock absorbingpasses through a gooseneck,
vertical vibration between a
tractor and a gooseneck connection part of a load trailer is reduced, and the vibration in the travelingdirection between the
tractor and the load trailer is also reduced; according to a second layer ofbuffering and shock absorbing, through a double shock absorbing suspension
system cooperating a suspension lifting cylinder and a torsion bar spring, swaying and
impact of the loadtrailer when encountering uneven
road surface are retarded, and it can be ensured that the vibrationduring emergency braking is significantly reduced; and according to a thirdlayer of buffering and shock absorbing,through an active buffering mechanismof a device transportation platform,
impact and vibration on the precision instrument device in the driving direction during braking of the semitrailer are reduced. The threelayers of buffering and shock absorbing protect the precision instrument device in all directions layer upon layer, and the
transportation safety of precision instrument deviceiseffectively protected.