▎ 摘　　要

NOVELTY - Preparing graphene-based heterogeneous electrocatalytic cathode involves dissolving the transition metal salt or complex in the graphene oxide dispersion liquid for wet co-spinning, then obtaining the graphene oxide composite fiber through a coagulation bath, assembling and reducing the graphene oxide composite fiber obtained to obtain product. USE - Method for preparing graphene-based heterogeneous electrocatalytic cathode used in wastewater treatment (claimed). ADVANTAGE - The method has high catalytic activity, good circulation stability and wide application prospect.