The invention discloses a forward osmosis-three-dimensional electrode combined reactor and a method for removing PPCPs (Pharmaceuticals and Personal Care Products) in sewage by virtue of a combined reactor. The forward osmosis-three-dimensional electrode combined reactor comprises a top plate, an anode net, a silica gel sealing pad A, activated carbon three-dimensional particles, a cathode net, aforward osmosis membrane, a silica gel sealing pad B and a base plate, wherein an anode and a cathode are mounted in the silica gel sealing pads, the activated carbon three-dimensional particles are located between the two electrodes, and the forward osmosis membrane is located between the two silica gel sealing pads. According to the forward osmosis-three-dimensional electrode combined reactor and the method, PPCPs are effectively intercepted by virtue of an interception effect of the forward osmosis membrane and the intercepted PPCPs are also oxidized and degraded by virtue of an electrochemistry oxidation effect of a three-dimensional electrode, so that the harmless removal of the PPCPs is realized; by utilizing a low-pressure reverse osmosis device, the stability of the concentration of extracting liquid is guaranteed, the PPSPs entering the extracting liquid can be intercepted again, so that the good effluent quality is guaranteed; and the simultaneous interception and degradationof PPCPs are integrally realized.