The invention discloses an electroplating power supply circuit for realizing stable output of any waveform. The electroplating power supply circuit comprises a power supply signal input circuit, a feedback current signal circuit, a current comparison circuit, a power supply circuit, a power amplifier, a feedback voltage signal circuit, a voltage comparison circuit, a power supply output circuit, and a power supply selection output circuit; the power supply signal input circuit amplifies an input power supply signal; the feedback current signal circuit performs amplification processing on an input load feedback current signal and inputs the same into the current comparison circuit to be compared with an input current signal, and an obtained current difference is input to the power supply selection output circuit; the feedback voltage signal circuit performs operational amplification processing an an input load feedback voltage signal, inputs the same into the voltage comparison circuitto be compared with an input voltage signal, and an obtained voltage difference is input into the power supply selection output circuit; the power supply selection output circuit selects the voltage difference or the current difference, inputs the voltage difference or the current difference into the power supply output circuit and transmits the same into a load through the power amplifier.