A　microwave　photonic　frequency　downconverter　is　proposed　and　experimentally　demonstrated　based　on　an　integrated　polarization　division　multiplexing　dual-parallel　Mach-Zehnder　(PDM-DPMZM)　modulator.　The　radio　frequency　(RF)　and　the　local　oscillator　(LO)　signals　are　feed　to　the　modulator　through　two　electrical　90　degrees　hybrid　couplers,　respectively.　The　carrier　suppress　single　sideband　(CS-SSB)　modulation　can　be　achieved　by　adjusting　the　DC　biases　of　the　modulator.　Then　an　intermediate　frequency　(IF)　signal　can　be　obtained　by　beating.　The　microwave　photonic　frequency　downconversion　link　based　on　PDM-DPMZM　is　built.　The　result　shows　that　both　optical　carrier　sideband　suppression　ratio　and　sideband　suppression　ratio　are　over　20dB,　and　the　spurious-free　dynamic　range　achieves　98.0　dB.Hz(2/3).　No　extra　mixing　spurs　interferes　the　interested　IF　signal　owing　to　the　CS-SSB　modulation.　Besides,　the　proposed　method　has　good　isolation　between　the　RF　signal　and　LO　signal.