A simple vehicle rack includes: a fixing rod, a middle part of the fixing rod being an H-shaped reinforcing seat, the H-shaped reinforcing seat forming an upper sliding slot on a top surface of the fixing rod and forming a lower sliding slot on a bottom surface of the fixing rod; two fixing frames, the fixing frames being fixed on the top surface of the fixing rod and connected to the fixing rod, moving back and forth along the upper sliding slot; and two support frames, the support frames being fixed on the bottom surface of the fixing rod and connected to the fixing rod, moving back and forth along the lower sliding slot.