The invention provides a shielded voltage-sharing circuit. The circuit includes a main circuit and an auxiliary circuit parallel to the main circuit; the main circuit includes a thyristor level equivalent circuit and a metal terminal to ground capacitance and saturation reactor equivalent circuits; and the auxiliary circuit includes M pi-type circuits which are in successive series. According to the technical schemes, shielding potential fixed point can be isolated from electric of the main circuit, the first end and the tail end of a converter valve and a shielding case are only in electricalconnection, and therefore, discharging effects in the converter valve on ground stray capacitance can be shielded, and voltage equalization distribution of wide frequency domain scaled series thyristors can be realized; and under the impact of steep waves, the unevenness of thyristor voltage is less than 1%, the largest voltage steepness can be reduced to 6.8 kV/[mu]s, no distortion of voltage ofkey components of the converter valve under wide frequency domain can be realized, the reliability and insulation tolerance of components can be enhanced, and the circuit has high engineering application values.