In　this　work,　the　A-site　complex　perovskite　K1/2Bi1/2TiO3　(KBT)　was　first　found　to　demonstrate　a　normal-relaxor　ferroelectric　modulation　by　the　annealing　temperature.　KBT　ceramics　were　synthesized　by　the　solid-state　reaction　method　and　subjected　to　a　post-annealing　at　800　degrees　C　or　1000　degrees　C,　respectively.　It　is　found　that　the　post-annealing　at　800　degrees　C　switches　KBT　to　a　relaxor　ferroelectric　while　the　post-annealing　at　1000　degrees　C　makes　KBT　develop　into　a　normal　ferroelectric.　Besides,　the　sample　annealed　at　800　degrees　C　presented　an　inflection　at　155　degrees　C　to　decrease　the　Pr　due　to　the　enhanced　relaxor　behavior.　Moreover,　annealing　at　1000　degrees　C　could　promote　the　growth　of　the　domains　and　the　local　ordering　of　A-site　cations.　It　is　believed　that　the　modulation　of　KBT　between　the　normal　ferroelectric　and　relaxor　was　attributed　to　the　domain　size　and　the　local　ordering　of　A-site　cations.　Published　by　AIP　Publishing.