According　to　the　double-plate　proximity　capacitance　sensor　with　the　same　area　and　different　area　electrodes,　the　orthogonal　test　was　proposed　to　optimize　the　design　of　the　sensor,　and　the　influence　of　the　sensor　parameters　was　analyzed,　respectively.　This　experiment　was　feasible,　the　efficiency　of　experiment　could　be　improved　to　33%,　and　the　importance　of　parameters　affecting　sensor　signal　intensity　was　effectively　analyzed.　Results　show　that　the　parameters　in　order　of　important　influence　are　spacing-width　ratio,　length-width　ratio　and　excitation　frequency　with　the　same　area　electrode　and　the　spacing,　length,　width　and　excitation　frequency　with　different　area　electrodes.　Experiment　results　agree　well　with　the　results　of　numerical　simulation　using　the　COMSOL.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.