Abstract: Abstract: In order to understand more features about reversibly thermochromic bamboo/plastic composites(BPC), we focused on its response to the temperature, light and thermal property, which included that, the effect of environment temperature on discoloration time, insolation experiment (test temperature of outside environment and inside of insolation device), reflectance and thermal conductivity of reversibly thermochromic bamboo/plastic composites and so on. The results showed that, the higher the environment temperature was, the shorter the discoloration time of the reversibly thermochromic BPC was. Taking WTB1 (BPC and blue thermochromic microcapsules) as an example, the color-changing time were 256.11, 146.18, 82.78, 69.16, 45.06 s accordingly to that the temperature were 45, 50, 55, 60, 65℃ respectively. And the differences of discoloration time among all the samples gradually diminished as the increasing of the environment temperature. The results of the insolation experiment indicated that the variation of environment temperature was verging to placid, but the temperature inside the insolation device was increased quickly and then decreased sharply. The color of samples would influence inside temperature of insolation boxes and the addition of titanium dioxide to composites could reduce it. Differences of temperature at 12:00 am between inside insolation boxes with the test specimen of WTB1, WTB2, WTB3, WTB4, WTR1, WTR2 covered respectively and outside environment were 14.3, 12.8, 15.3, 11.3, 15.3, 11.3℃. The thermal conductivity of the reversibly thermochromic BPC was increased as the increasing of the testing temperature. The thermal conductivity of WTB2 were 0.098, 0.099, 0.103, 0.107 W/(m K) correspondently to that the test temperature were 15, 30, 45, 60℃ respectively. Comparing the thermal conductivities of WTB1, WTB2, WTB3, the reversibly thermochromic microcapsules increased thermal conductivity of samples when the test temperature were 15, 30, 45℃. While comparing the thermal conductivity of WTB2, WTB4, WTR2, the thermal conductivity of WTB4 was the highest, followed by WTB2, the smallest was that of WTR2 at test temperature of 15℃. But as the increasing of temperature, the size sequency of the thermal conductivity was WTB2 (biggest), WTB4 and WTR2 (smallest). The surface free energy and the contact angles of WTB1 without titanium dioxide were 41.50 MJ/m2 and 67.3° respectively, while surface free energy and contact angles of WTB2 with titanium dioxide were 37.52 MJ/m2 and 74.6° respectively. Contact angles, polar force and surface free energy of blue bamboo/plastic composites and ordinary bamboo/plastic composites were nearly equal. The reflectance of test specimen was different. Titanium dioxide added to the reversibly thermochromic BPC enhanced the surface reflectance of composite materials, the color was one of the important factors which would influence the reflectance of composite materials. The research results in this paper will provide data support for the practical application of the reversibly thermochromic BPC.