Abstract: In order to obtain carbon nanotubes with excellent electromagnetic properties,Ni-Co-P ternary alloy were plated on the surface of carbon nanotubes.The carbon nanotubes were characterized with TEM,EDS and VSM after electroless plating,which show that the coating was complete,uniform and soft magnetic materials.The electromagnetic nanotubes plated with Ni-Co-P ternary alloy have show that the absorbing mechanism was magnetic loss.