Dear editor,rnPhysical-layer security(PLS)has been regarded as a prominent technique to achieve secure com-munications for heterogeneous networks(HetNets)with simultaneous wireless information and power transfer(SWIPT)[1].Meanwhile,the stochas-tic channel state information(CSI)error will decrease the PLS performance of HetNets with SWIPT.However,the existing robust PLS re-searches considering stochastic CSI error focus on the traditional single-tier network[2,3],which do not consider the existence of various types of co-channel interference(CCI)in HetNets with SWIPT.Therefore,these previous studies can-not be extended to secure HetNets with SWIPT straightforwardly.In fact,by designing a trans-mission scheme properly,such as the cross-tier cooperation between the macrocell base station(MBS)and the femtocell base stations(FBSs),the CCI can be used to facilitate efficient power transfer and secure communications.However,the design will become difficult and complicated if considering the existence of stochastic CSI er-ror,which motivates our work in this study.