A　resonant　micro-pressure　sensor　based　on　a　double-ended　quartz　tuning　fork　(DEQTF)　and　bossed　silicon　diaphragm　in　atmospheric　packaging　is　presented.　To　achieve　vacuum-free　packaging　with　a　high　quality　factor,　the　DEQTF　is　designed　to　resonate　in　an　anti-phase　vibration　mode　in　a　plane　that　is　under　the　effect　of　slide-film　damping.　The　feasibility　is　demonstrated　by　theoretical　analysis　and　a　finite　element　simulation.　The　dimensions　of　the　DEQTF　and　diaphragm　are　optimized　in　accordance　with　the　principles　of　improving　sensitivity　and　minimizing　energy　dissipation.　The　sensor　chip　is　fabricated　using　quartz　and　silicon　micromachining　technologies,　and　simply　packaged　in　a　stainless　steel　shell　with　standard　atmosphere.　The　experimental　setup　is　established　for　the　calibration,　where　an　additional　sensor　prototype　without　a　pressure　port　is　introduced　as　a　frequency　reference.　By　detecting　the　frequency　difference　of　the　tested　sensor　and　reference　sensor,　the　influences　of　environmental　factors　such　as　temperature　and　shocks　on　measuring　accuracy　are　eliminated　effectively.　Under　the　action　of　a　self-excitation　circuit,　static　performance　is　obtained.　The　sensitivity　of　the　sensor　is　299　kHz　kPa(-1)　in　the　operating　range　of　0-10kPa　at　room　temperature.　Testing　results　shows　a　nonlinearity　of　0.0278%FS,　a　hysteresis　of　0.0207%FS　and　a　repeatability　of　0.0375%FS.　The　results　indicate　that　the　proposed　sensor　has　favorable　features,　which　provides　a　cost-effective　and　high-performance　approach　for　low　pressure　measurement.