Abstract: In order to reduce the energy consumption of buildings to achieve sustainable development of buildings, this study used methyl palmitate-myristate (MP-MA) binary eutectic to prepare a stable binary composite phase change microcapsule material MP-MA@MMA by emulsion polymerisation, and applied it to foamed concrete to prepare a composite phase change thermal storage foamed concrete (PCFC) with suitable temperature regulation and heat storage capacity. The performance tests of MP-MA@MMA showed that the optimal mass ratio of MP to MA in MP-MA binary eutectic was 80.13:19.87. The thermal performance results indicated that the prepared MP-MA@MMA had a stable morphological structure and physical properties as well as a suitable phase transition temperature (23.92 ℃) and a good latent heat of phase transition (115.51 J/g). The variation of the thermal conductivity of PCFC at 500 kg/m³ dry density was explored by varying the doping amount of MP-MA@MMA in PCFC (0wt%, 3wt%, 6wt%, 9wt%, 12wt%). The experimental results show that the PCFC thermal conductivity decreases gradually with the increase of MP-MA@MMA doping. The thermal conductivity reaches a minimum value of 0.1214 W/(m·K) when the MP-MA@MMA doping is 12 %. The thermal performance of PCFC was tested by infrared thermography, and the results showed that PCFC possesses effective temperature regulation and thermal management capabilities, and has great potential in reducing building envelope energy consumption.