Auxiliary supporting device of forming machine and forming machine

The utility model provides a forming machine auxiliary supporting device and a forming machine, the forming machine auxiliary supporting device comprises a switching assembly, a plurality of driving assemblies, a plurality of connecting rod assemblies and a plurality of first supporting assemblies, the switching assembly is connected with a turn-up drum, and the switching assembly can move along with the turn-up drum in the direction close to or away from a tire body overlapping drum; the multiple driving assemblies are arranged around the peripheral side of the switching assembly at intervals, and at least one part of each driving assembly can move in the axial direction of the switching assembly relative to the driving assembly. One end of the connecting rod assembly is connected with the driving assembly, when the driving assembly moves relative to the switching assembly, the connecting rod assembly moves along with the driving assembly, and the axial included angle between the connecting rod assembly and