<p>An electromagnetic induction heating molding device has been designed to address the issues of high energy consumption and slow heating speed of straw-based composite molding. The electric–magnetic coupling of molding heating has been simulated using finite element analysis software, which focuses on the analysis of the effects of various coil arrangements (round-trip, spiral, and honeycomb arrangements), heating distances, coil spacing, etc., on the rate of electromagnetic induction heating of the mold and the temperature uniformity. This conclusion is based on numerical simulation, which provides a valuable theoretical basis and optimization direction for the application of the device in actual production. In the subsequent experimental stage, the relevant parameters can be finely adjusted according to the characteristics of the materials and the conditions of the equipment, etc., in order to ensure that the device operates efficiently in the actual production.</p>