Facilitating the holistic development and robust growth of students'multifaceted competency requires deep integration teaching.As truly holistic teaching,deep integration teaching fosters multi-directional integration,focuses on deep soul and generates comprehensive effects.As a powerful concept characterized by high generality,rich significance and broad transferability,big idea holds a central and essential role in deep integration teaching.Structurally,the three pillars of deep integration teaching include practice task as fundamental mechanism(outer layer),core issue as basic tool(middle layer)and big idea as deep soul(inner layer).Operationally,the fundamental pattern of deep integration teaching design with big idea as soul involves describing,manifesting,activating,constructing and invoking big idea.Thus,the inner three pillars and the outer five stages constitute the deep integration teaching model with big idea as soul.