The present invention relates to a technique for heating food. In particular, it relates to a high-temp. steaming sectional quick-boiling heating method for food and its equipment. Said invented method includes: using natural stone material and mixing it with various coals and salt to be made into slow heating material and quick heating material respectively through soft-firing program and hard-firing program treatments; mixing said heating materials to obtain a heating material; mixing the heating material with water to produce three-stage type high-temp steam to preheat food from cold-stored state, then heat to 100% cooking temp. so as to attain the goal of cooking food. Said method also can be used for emergency treatment and sterilization at cold area.