Compressed　air　vehicle　is　characterized　by　low　cost,　easy　operation,　and　zero　pollution.　In　this　study,　a　compressed　air　vehicle　test　table　is　built　based　on　pneumatic　motor　(PM).　Influences　of　key　parameters,　such　as　regulator　valve　pressure,　rotation　speed,　and　torque　on　exhaust　pressure,　intake　pressure,　expansion　ratio,　volume　flow　rate,　power　output　and　compressed　air　consumption　rate　of　PM　are　discussed.　Universal　characteristics　curve　is　an　important　reference　to　analyze　the　performance　of　PM.　Hence,　universal　characteristics　of　PM　is　analyzed.　Finally,　relative　error,　error　bar　and　sensitivity　analysis　of　the　experimental　are　discussed.　Experimental　results　show　that　the　high-power　region　of　PM　falls　around　regions　with　great　volume　flow　rate,　relatively　high　torque,　and　moderate　rotation　speed.　For　PM,　the　most　economic　region　is　expected　to　fall　in　the　center　of　universal　characteristics.　Moderate　torque　and　rotation　speed　are　the　relatively　economic　operation　regions　of　PM.　When　the　regulator　valve　pressure　is　9　bar,　the　torque　is　11　N.m,　and　the　rotation　speed　is　880　r/min,　the　power　output　of　PM　reaches　1014.5　W.