The invention relates to a supersonic flame spraying iron aluminum and zinc composite board production line, which comprises an uncoiling machine, an inlet clamping and conveying device, an inlet shear, a three-roll deviation correcting machine, a detection table, an outlet shear, an outlet clamping and conveying device and a coiling machine, wherein the uncoiling machine, the inlet clamping and conveying device and the inlet shear are arranged at an inlet part of the production line, the three-roll deviation correcting machine and the detection table are arranged at a processing part of the production line, and the outlet shear, the outlet clamping and conveying device and the coiling machine are arranged at an outlet part of the production line. The production line is characterized by also comprising a supersonic flame aluminum spraying machine, a first cold rolling machine, a supersonic flame zinc spraying machine, a second cold rolling machine and a static oil coating machine which are arranged at the processing part of the production line, wherein the supersonic flame aluminum spraying machine is arranged behind the inlet shear, and the first cold rolling machine is arranged behind the supersonic flame zinc spraying machine. The invention solves the problems in the prior art and provides the production line for compounding aluminum or zinc on iron boards by using the supersonic flame spraying machine, the produced iron aluminum and zinc composite boards replace non-ferrous metals in short supply, the consumption of noble non-ferrous metals is reduced, and the production line has the characteristics that the energy is saved, the environment is protected, the processing is convenient, the decoration effect is good, the cost is low, and the like.