Abstract: The efficiency and safety of coal mining are crucially dependent on the cycloidal tooth profile of the chain wheel of long wall coal mining technology, yet its generation process is affected by mining uncertainty, making it challenging to meet the demands of efficient and safe coal mining for feature selection and extraction. Therefore, this paper presents a generated method for the cycloidal tooth profile of the chain wheel of long wall shearer, which is based on the Duffing chaotic oscillator. The equation of the cycloidal tooth profile is established, and its structural parameters are derived by using the reversal method. The Spiroflex Method corresponds to the gear cutting process based on the actual engaging state and application principles, and the geometric parameters of the cycloidal tooth profile of the chain wheel are corrected. A dynamic model is constructed based on the Duffing chaotic oscillator to describe the process of geometric parameter variation of the tooth profile under nonlinear periodic drive and generate the cycloidal tooth profile of the chain wheel of long wall shearer. The experimental results demonstrate that under the given design parameters, the radial displacement, axial displacement, and normal deviation angle of the research method exhibit small deviations from theoretical values, satisfying the requirements for circumferential backlash and tooth profile clearance, and ensuring the engaging state and service life of the shearer chain wheel during application.