The invention relates to a microcapsule temperature-sensitive material, a preparation method and applications thereof, wherein the temperature-sensitive material comprises, by weight, 40-50% of isopropanol, 50-60% of microcrystalline wax, or 25-40% of isopropanol, 49-70% of microcrystalline wax, 2-8% of stearic acid, 0.5-1.5% of silicate, 0.5-1% of strong alkali, and 1-3% of water. According to the present invention, the temperature-sensitive material can be easily coated on or attached to the easy heat generation part in the battery system, and can be caused to produce a certain change so as to emit gas after the temperature achieves a limit value, the gas sensor detects the gas, and the alarm is sent, such that the occurrence of the risk is avoided; and the microcapsule temperature-sensitive material has broad application prospects in the fields of the over-temperature alarming, the measurement of the large-area surface temperature distribution of objects, the temperature measurement of non-metal materials, the disinfection and sterilization temperature indicating, the application as the anti-counterfeiting mark, and the like.