Universal header and corn harvester

The invention provides a universal header and a corn harvester, and relates to the technical field of agricultural mechanical devices, the universal header comprises a rack, a conveying groove, an adaptive frame, a connecting seat, a universal joint assembly, a transmission closed gearbox, a feeding auger assembly, a dividing and cutting assembly and a side auger assembly; a conveying groove is formed in the rear surface of the machine frame, an adaptive frame is arranged on the periphery of the conveying groove and detachably installed on the machine frame, connecting bases are arranged on the two sides of the rear surface of the machine frame, a universal joint assembly is arranged in each connecting base, the universal joint assemblies are in transmission connection with a transmission closed gearbox, and a feeding auger assembly is arranged at the front end of the machine frame. A plurality of groups of dividing and cutting assemblies in transmission connection with the transmission closed gearbox are arr