The invention discloses a removable high-temperature-resistant pressure-sensitive adhesive and a preparation method thereof. The high-temperature-resistant pressure-sensitive adhesive is characterizedin that the pressure-sensitive adhesive is an acrylate pressure-sensitive adhesive and has a solid content of 40 to 50% and a glass-transition temperature Tg of more than -35 DEG C and less than -20DEG C. The removable high-temperature-resistant pressure-sensitive adhesive of the invention is free of displacement when applied in an environment with a temperature of 100 DEG C for 230 h, has peelstrength of 12 N/25 mm, leaves no residual adhesive, meets higher requirements of current adhesive market on pressure-sensitive adhesives in virtue of its excellent performance, and has excellent removability.