The invention relates to a pharmaceutical wastewater technology using microelectrolysis-Feton-EGSB (expanded granulate sludge bed)-A/O (anaerobic/aerobic)-BCO (biological contact oxidization)-BAF (biological aeration filtration)-coagulation treatment. High-concentration pharmaceutical wastewater is sequentially sent into an oil separation tank, a conditioning tank, a microelectrolysis reaction tank, a Feton catalytic oxidation tower, a horizontal flow type primary settling tank, a comprehensive conditioning tank, a hydrolysis acidifying tank, the EGSB, an A/O tank, a two-stage BCO tank, a secondary settling tank, a BAF tank, a coagulation tank, an air floating tank and a final settling tank to be treated, and then is drained after the standard is reached. The technology has the advantages that the technique is matured, the treatment effect is stable, and the anti-impact ability is strong; after the pharmaceutical wastewater is treated by the combined technology, the quality of drained water can reach the class-one standard of Comprehensive Drainage Standard of Wastewater (GB8978-1996).