A　microwave　photonic　phase-tunable　mixer　with　a　doubled　local　oscillator　(LO)　frequency　is　presented　based　on　an　integrated　dual-polarization　dual-parallel　Mach-Zehnder　modulator　(DP-DPMZM).　A　radio　frequency　(RF)　signal　is　sent　to　one　of　the　sub-DPMZMs　via　an　electrical　90　degrees　hybrid　coupler,　and　the　carrier-suppressed　single-sideband　(CS-SSB)　modulation　is　output.　Another　sub-DPMZM　is　modulated　by　a　LO　signal,　and　the　2nd-order　carrier-suppressed　double-sideband　(CS-DSB)　modulation　is　produced　by　combining　a　fiber　Bragg　grating　(FBG).　A　single　bias　voltage　of　the　modulator　can　change　the　phase　shift　linearly.　The　mixing　signal　with　double　LO　frequency　and　phase　shift　can　be　acquired　after　the　photodetector.　Experimental　setup　is　implemented,　and　the　results　indicate　that　the　spur　suppression　ratios　of　the　up/down-converted　signals　are　22.5　dB　and　25.2　dB.　The　spurious-free　dynamic　range　(SFDR)　values　are　102.97　dB.Hz(2/3)　in　the　down-conversion　mode　and　100.81　dB.Hz(2/3)　in　the　up-conversion　mode.　The　phase　shift　can　be　varied　continuously　in　the　range　of　360　degrees.　The　proposed　compact　link　is　characterized　by　function　multiplexing,　half　reduction　of　the　LO　frequency　and　high　electrical　purity.