This　paper　touches　on　a　sine　wave　transmitting　mode　being　designed　applicable　to　multichannel　high-power　electromagnetic　transmitters,　well　explaining　the　design　scheme　and　working　principle　of　each　module.　With　FPGA　as　the　core　to　build　the　hardware　platform　and　DSP　as　a　bridge　to　the　cooperation　between　the　upper　computer　and　the　FPGA　lower　computer,　this　very　mode　amplifies　the　MSK　signal　provided　by　the　external　interface　with　power　and　makes　it　featured　high-power,　high-energy　efficiency　as　well　as　frequency　accuracy,　realizing　the　transmitting　current　as　0.01Hz∼300Hz　standard　sine　wave　and　MSK　modulated　wave　output.　©　Published　under　licence　by　IOP　Publishing　Ltd.