High-power　electromagnetic　transmitter　power　supply　is　an　important　part　of　deep　geophysical　exploration　equipment,　especially　in　complex　environments,　where　how　to　control　the　high　accuracy　and　stable　output　of　the　power　supply　as　well　as　the　redundancy　safety　of　the　system　become　the　key　issue　in　its　designing.　A　triple-loop　control　including　inner　current　loop,　outer　voltage　loop　and　load　current　forward　feedback　and　a　digitalized　voltage/current　sharing　control　method　are　proposed　for　the　realization　of　the　rapid,　stable　and　highly　accurate　output　of　the　system.　System　simulation　and　field　geological　exploration　experiments　demonstrate　the　effectiveness　of　the　control　method　which　could　ensure　both　the　system＇s　excellent　stability　and　the　output＇s　accuracy.　©　(2013)　Trans　Tech　Publications,　Switzerland.