Microwave　photonic　link　(MPL),　which　processes　microwave　signal　with　photonic　technologies,　has　offered　many　advantages　such　as　increased　channel　capacity,　immunity　to　RF　disturbance,　reduction　of　size　and　weight,　and　low　loss.　External　modulation　of　the　MPL　applies　Mach-Zehnder　interferometer　(MZI)　for　the　modulating.　The　traditional　phase　transitional　behavior　of　the　EO　device　lacks　the　performances　required　for　quick　response,　low　half-wave　voltage　V-pi　and　high　loaded　power,　while　maintaining　low　noise,　high　SNR,　and　large　dynamic　range　operation.　This　paper　proposed　a　method　in　which　the　piezoelectric　ceramic-based　integrated　optical　waveguide　with　3dB　loss　at　the　highest　power　was　applied　to　the　MZI.　We　built　the　physical　model　for　the　phase　transitional　behavior　based　on　the　piezoelectrics,　analyzed　the　piezoelectric　properties　of　ceramics.　The　impacts　of　the　piezoelectric　ceramic　on　the　property　of　MPL　were　discussed　numerically.