The soft normally open points (SNOP) is introduced to solve challenges raised by renewable energy in the distribution network. Compared with back-to-back scheme, the novel series-shunt multiport SNOP ($\mathrm{S}^{2}$-MSNOP) is proposed with much lower cost and volume, which is suitable for practical implementation. Considering grid application scenarios, $\mathrm{S}^{2}$-MSNOP should be able to compensate for current harmonics. Therefore, this paper gives current harmonic compensation strategy for $\mathrm{S}^{2_{-}}$ MSNOP. It can supply its connected feeder with certain harmonics through coordinate regulation of all parts’ converters. First, the working principle of harmonic compensation is analyzed. Then the control strategy is presented. Finally, a simulation model is built to test the validity of the proposed strategy.