Based　on　advantages　and　disadvantages　of　tuned　mass　damper　(TMD)　and　multi-tuned　mass　damper　(MTMD)　in　civil　engineering　vibration　control,　considering　the　economic　efficiency　and　the　applicability　of　a　vibration-reduction　device　for　structures,　a　double-tuned　mass　damper　(DTMD)　was　presented.　The　motion　equation　of　a　DTMD　with　SDOF　system　under　simple-harmonic　excitations　was　established.　The　dynamic　magnification　factor　(DMF)　expression　of　the　DTMD-SDOF　system　was　derived.　An　optimization　strategy　and　an　evaluation　function　to　judge　performances　of　DTMD　were　proposed.　A　parameter　optimization　program　written　with　MATLAB　was　used　to　optimize　DTMD.　The　effect　of　each　parameter　on　the　dynamic　magnification　factor　was　analyzed　and　the　robustness　of　DTMD　was　evaluated.　When　the　damping　ratio　of　the　damper　and　the　natural　frequency　of　the　structure　controlled　were　changed.　Finally,　the　effectiveness　and　the　robustness　of　DTMD　were　compared　with　those　of　TMD　and　MTMD.　The　theoretical　and　numerical　results　showed　that　the　effectiveness　of　DTMD　is　much　better　than　that　of　TMD　and　MTMD,　and　DTMD　has　the　best　robustness　to　the　perturbation　of　the　controlled　structure　frequency;　so,　DTMD　is　a　very　effective　device　of　vibration　control.　©,　2015,　Chinese　Vibration　Engineering　Society.　All　right　reserved.