A horizontal electroplating production line includes a horizontal electroplating apparatus and a circuit board feeding device. The horizontal electroplating apparatus includes a first frame, an electroplating tank and a horizontal electroplating conveying device arranged at the first frame, the electroplating tank extends along a first direction, the horizontal electroplating conveying device is configured to clamp a circuit board and move the circuit board in the electroplating tank for electroplating, the circuit board feeding device includes a second frame and a feeding conveying mechanism arranged at the second frame, the feeding conveying mechanism is a conveying line with a certain length, and the feeding conveying mechanism is configured to place the circuit board horizontally and convey the circuit board to the horizontal electroplating conveying device of the electroplating apparatus.