The invention belongs to the technical field of water treatment, and particularly relates to a method for removing hydrochloric ether in underground water containing a surface active agent through a nanoscale zero-valent iron reinforcing sodium percarbonate/Fe (II) system. The method comprises the following steps that (1) water is firstly added into a reaction bulb, then a pre-made hydrochloric ether stock solution and a surface active agent stock solution are correspondingly added, a to-be-treated hydrochloric ether contaminated solution containing the surface active agent is prepared, then FeSO4.7H2O, nZVI and SPC are added, and reaction is conducted; (2) the reaction bulb is placed on a magnetic stirring unit, the rotating speed, the reaction temperature and the reaction time are controlled, and sampling analyzing is conducted at established time points; and (3) a sample taken out is immediately added into a brown extraction bottle containing n-hexane, vibration is conducted througha vortex mixer at room temperature, after full extraction and still standing are conducted, and gas chromatography is conducted by taking an upper layer organic phase. The degradation effect on trichloro ethylene is obvious through the method, and the degradation rate is above 80%.