Abstract: To solve the defects of low thermal conductivity and leakage of organic solid-liquid phase change materials (PCMs), ZIF-67 was etched by tannin acid to obtain the carbon-based supports (HX-C), stearic acid (SA) was the phase change material and then used to prepare the enhanced thermal conductivity PCMs (SA/HX-C) via vacuum melting adsorption method. In detail, thermal stability, heat storage property, thermal conductivity, shape stability and photo-thermal conversion were investigated to evaluate the thermal storage performance. Meanwhile, characterizations of nitrogen isothermal adsorption-desorption, FTIR, XRD and SEM were conducted. Results revealed that tannic acid can expand the pore size of carbonized ZIF-67 derivatives, thus enhancing the shape stability. The obtained SA/HX-C own favorable heat storage property, thermal conductivity, and photo-thermal conversion. Among them, etching time of 6 min for PCMs (SA/H6-C) exhibits high thermal storage efficiency of 80.84% and photo-thermal conversion of 76.29%. Thermal conductivity is strengthened to 0.461 W/(m·K), which is 156.11% higher than that of SA. No leakage and shape change are observed for SA/H6-C during phase transition, it still shows good thermal storage performance even after recycling 100 times.