In　order　to　study　the　wireless　detection　technology　of　strain　sensor.　A　microstrip　antenna　wireless　strain　sensor　based　on　radio　frequency　identification　(RFID)　was　proposed　by　using　ultra　high　frequency　RFID　system　through　electromagnetic　wave　interaction.　The　microstrip　antenna　sensor,　as　a　tag　antenna,　received　the　RFID　signal,　which　activated　the　chip　in　RFID　tag.　The　background　noise　can　be　eliminated　by　the　signal　modulation　technology.　Then,　the　effective　signal　returned　to　the　antenna,　and　the　deviation　of　the　resonant　frequency　informed　the　reader　of　realizing　the　wireless　passive　strain　detection.　Two　kinds　of　RFID　microstrip　antenna　sensor,　inserted-feeding　type　and　edge-feeding　type　were　designed.　The　operating　gain,　return　loss　and　electric　field　strength　were　simulated　and　optimized　by　HFSS　(high　frequency　structure　simulator).　Through　the　analysis　of　solid　mechanics　coupled　with　electromagnetics　by　COMSOL,　the　principle　that　the　deviation　of　the　resonant　frequency　was　proportionally　to　the　strain　in　these　two　types　of　sensors.　The　simulation　results　are　consistent　with　the　theoretical　values,　which　can　meet　the　requirements　for　structural　strain　measurement,　and　lay　a　theoretical　foundation　for　experimental　research.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.