A portable vehicle washing assembly for automatically washing vehicles in a remote location includes a frame that includes a plurality of legs and a roof to have a vehicle drive beneath the frame. A plurality of first sprinklers is each of the first sprinklers is disposed on the frame to spray a liquid onto the vehicle. A plurality of second sprinklers is disposed on the frame to spray a liquid onto the vehicle. A first fluid pump is disposed on the support cage to pump a fluid and a liquid soap into the first sprinklers for washing the vehicle. A second fluid pump is disposed on the frame and the second fluid pump is in fluid communication with each of the second sprinklers to spray a mixture of the fluid and the liquid soap onto the vehicle for washing the vehicle.