The invention provides a method for electrochemically promoting humus-mediated microbial reductive dehalogenation of halogenated aromatic pollutants, and belongs to the technical field of biological resources. The method comprises the following steps: smearing a conductive adhesive onto the surface of a graphite electrode, and adhering humus onto the surface of the conductive adhesive; placing thehumus-adhered graphite electrode and an Ag/AgCl saturated electrode in a catholyte, and placing a platinum electrode in an anolyte; connecting an electrochemical workstation with the graphite electrode, the Ag/AgCl saturated electrode and the platinum electrode, and applying external voltage of -600mV to -700mV to a working electrode, and continuously electrifying for 7-9 days, wherein the catholyte contains microbes and halogenated aromatic compounds. By the method, microbial reductive dehalogenation of halogenated aromatic compounds in the catholyte can be promoted; the solid humus is reduced by the graphite electrode, and the microbes use the reduced solid humus as an electron donor to perform reductive dehalogenation on the halogenated aromatic compounds.