Multi-functional automobile frame longitudinal beam clamping and supporting platform

The invention relates to a multi-functional automobile frame longitudinal beam clamping and supporting platform, and belongs to the technical field of automobile frame machining equipment. The multi-functional automobile frame longitudinal beam clamping and supporting platform comprises a supporting table and supporting assemblies arranged at four corners of the upper end surface of the supportingtable, wherein each supporting assembly comprises a first supporting seat, a second supporting seat, a rotating shaft and a worm wheel, assembling grooves are formed in the upper end faces of the first supporting seats and the second supporting seats, arc-shaped first guide grooves are formed in the two side walls of the assembling grooves, first guide rails are fixedly connected to the two end faces of the worm wheels, clamping grooves are formed in the worm wheels, bearings and worms are fixedly connected to the rotating shafts, the outer side walls of the bearings are fixedly connected with the side walls of the a