The invention relates to a composite material molding technology, in particular to an FRP rebar production line using a novel gum dipping tank. The FRP rebar production line sequentially comprises a fiber creel, a yarn threading plate, the gum dipping tank, a forming mold, a winding device, a curing forming device, traction equipment and a cutting device; a light reflection plate of the curing forming device adopts concave oval design, so that light is conveniently collected to the surface of a composite material, and a reaction of resin is better facilitated; a light source device of the curing forming device extends in a 45-degree light wave shape, an ultraviolet emission point of the curing forming device is fixed on a corresponding surface of one end of an oven, light extends at the middle of the oven in a crossed manner, rebar passes through crossed points, and balanced irradiation of the two faces of the rebar is better ensured; and an ultraviolet absorbing device or baffle is arranged at the tail end of the oven of the curing forming device, and damage of ultraviolet ray leakage to the human body is prevented.