In　this　study,　a　series　of　high-entropy　rare-earth　zirconate　(La0.2Nd0.2Sm0.2Eu0.2A0.2)2Zr2O7　(A　=　Dy,　Ho,　or　Er)　ceramics　containing　five　principal　elements　were　synthesized　via　the　high-temperature　solid-state　method,　and　their　potential　as　high-temperature　thermosensitive　ceramics　was　investigated.　X-ray　diffraction　and　Raman　spectroscopy　confirmed　the　single-phase　pyrochlore　structural　characteristics　of　these　ceramics,　while　scanning　electron　microscopy　revealed　a　dense　microstructure.　Electrical　measurements　demonstrated　that　these　ceramics　are　capable　of　operating　at　temperatures　up　to　1500　°C　and　exhibiting　exceptional　sensitivity　within　the　400–1500　°C　range,　both　of　which　are　attributed　to　their　high　resistivity　at　elevated　temperatures　and　a　large　material　constant　B　value　(≥11,241　K)　across　the　entire　operating　temperature　span.　Notably,　(La0.2Nd0.2Sm0.2Eu0.2A0.2)2Zr2O7　(A　=　Dy,　Ho,　or　Er)　ceramics　also　maintained　a　resistivity　drift　rate　of　≤0.53　%　after　500　h　of　continuous　exposure　at　1500　°C,　a　result　ascribed　to　the　high-entropy　effect　suppressing　lattice　distortion,　as　evidenced　by　ab　initio　molecular　dynamics　simulations.　These　findings　validate　the　high-entropy　strategy　as　a　promising　approach　for　developing　durable,　high-performance　NTC　thermistors　for　extreme-temperature　applications.　©　2025