A thermosensitive nanocapsule includes core materials and wall materials. A preparing method includes: first, making water phase and oil phase respectively, forming microemulsion by means of high speed shearing after mixing, and forming nanoemulsion via ultrasonic treatment or high pressure homogenization； then adding nitrogen to the emulsion and carrying out the reaction under a temperature of 40ˆ¼80°C for 3ˆ¼4hrs in the nitrogen atmosphere； finally obtaining the thermosensitive nanocapsule.
