The invention discloses an MBR (membrane bioreactor) wastewater treatment process, comprising the steps of I, subjecting a membrane component to hydrophilicity treatment; II, fixing the membrane component to an aeration tank, and stably placing the membrane component perpendicular to the bottom of the aeration tank; III, filtering large particulate impurities from wastewater, adding water, activated carbon and activated sludge into the aeration tank in a ratio of 3:0.5:1 or 3:0.8:1.2; IV, aerating for 3-4 h, extracting wastewater, adding a reducing agent into the wastewater; V, adding a neutralizer into the reduced water in a ratio of the water to the neutralizer being 3:1, and allowing to neutralize for 3-4 h; VI, allowing the neutralized water to naturally settle in a settling tank for 1-1.5 h; VII, extracting clear supernate, adding an oxidant into the clear supernate, and allowing to oxidize for 1-2 h before emission. The process herein is effective in treating MBR wastewater to prevent secondary pollution.