Based on the curriculum standards, document retrieval, innovative design, materialization scheme, feasibility verification and promotion and application are the effective ways to realize the innovative self-control of teaching aids. The self-made teaching aid gravity potential energy experimental device uses the measured object falling in the cylinder to push the deflection angle of the pointer and qualitatively explore the relationship between gravity potential energy and the mass and height of the object. It is scientific and effective, and is applicable to the demonstration experiment of gravity potential energy in junior high school physics.