The reciprocating double swing arm car washing machine is a touchless fully automatic car wash equipment. The vehicle stays stationary while the gantry moves back and forth on the track. Two sets of high-pressure swing arms on the left and right automatically swing and follow the vehicle contour for profiling positioning. It completes full car cleaning and maintenance in one process through high-pressure water jet, pre-wash agent, cleaning foam, wax coating, pure water rinsing and powerful air drying.