The invention relates to a film-structure X-waveband radar wave-absorbing material which mainly comprises six wave-absorbing coatings and five plastic films. A plastic film is arranged between every two wave-absorbing coatings, each wave-absorbing coating is a mixture of 1.50 parts of coupling agent, 50 parts of thinner, 150 parts of carbonyl iron absorber, 39.83 parts of 60 percent epoxide resin and 12.93 parts of curing agent, the plastic films adopt one of polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polystyrene, ethylene/ethyl acetate and daiamid, the coupling agent adopts a silane coupling agent KH550, the thinner is prepared from xylene and butanol in a volume ratio of 7:3 or prepared from xylene, acetone and butyl acetate in a volume ratio of 4:3:3, and the curing agent adopts polyetherimide D400. The wave-absorbing material has small thickness, low density, light weight, strong mechanical property, simple production process, low cost and good wave-absorbing performance in the X waveband, thereby being suitable for use on X-waveband radars or arms with stealth performance requirement.