Phase change material (PCM) with thermal energy storage capacity and automatic temperature regulation hold tremendous potential for construction energy conservation. However, conventional PCMs often exhibits liquid leakage, volume change and insufficient mechanical property, which are prone to load-bearing accidents, hindering their application as an engineering building material. Herein, inspired by the oriented 'brick-and-mortar' structure in bone, we report a facile strategy to develop a form-stable, ultrastrong and highly energy-stored comp...