Special fixture and assembly technology for assembling pallet body and hinged seat of circular cooler

The invention discloses a special fixture for assembling a pallet body and a hinged seat of a circular cooler, which comprises a base, and a first support and two second supports which are arranged on the base, wherein the first support is provided with an accommodating part for allowing the hinged seat to be accommodated in, and hinged seat positioning holes coaxially formed along a first axial line are formed on the support bodies on two sides of the accommodating part; the two second supports are provided with pallet body positioning holes coaxially formed along a second axial line; the height difference between the first axial line and the second axial line is equal to that between the axial line of a wheel shaft of the pallet body and the axial line of a shaft hole of the hinged seat; and in the horizontal projection plane, the included angle between the first axial line and the second axial line is equal to that between the axial line of the wheel shaft of the pallet body and the axial line of the shaft