Abstract: Aiming at the technical bottlenecks of insufficient fixation at the upper part of the U-shaped trough, poor temperature uniformity, low strip-forming rate and unsatisfactory strip quality during the fixation and strip-shaping process of current fixation and strip-shaping machines, this study designed an upper-heating continuous fixation and strip-shaping machine. To improve the effect of the fixation process, an upper heating unit was added to the fixation section of the U-shaped trough; through temperature field simulation analysis of the fixation section of the trough combined with physical test verification, the regulation effect of the heating unit on the temperature uniformity of the trough was significantly enhanced. Meanwhile, to reveal the movement mechanism and forming law of tea leaves during the strip-shaping process, a systematic dynamic analysis was carried out on the strip-shaping movement of tea leaves in the trough, and a tea-leaf-trough coupled dynamic model was established. The movement process of tea leaves in the trough was divided into 5 characteristic stages, and the movement characteristics, force distribution law of tea leaves and their influence mechanism on tea forming effect in different stages were systematically explored. It was initially determined that trough width, trough depth, feed quantity and crank rotation speed were the core factors affecting the strip-shaping quality. To further screen the key influencing factors, a strip-shaping process simulation model was established in the EDEM discrete element simulation software to conduct numerical simulation calculation and simulation of the entire strip-shaping process of tea leaves, and single-factor simulation tests were carried out; based on the dynamic curves of average velocity and average force of tea particles changing with time during the strip-shaping process obtained from the simulation, it was finally determined that trough width, feed quantity and crank rotation speed were the key influencing factors regulating the strip-shaping quality. To realize the optimal matching of key process parameters, this study selected fresh leaves of Dushan small-leaf tea tree, a special raw material for making Lu'an Guapian tea, as the test material, took the screened key factors as test variables, and took strip-forming rate and sensory score as core evaluation indicators, and adopted a three-factor three-level quadratic rotational orthogonal test design scheme to carry out the test research. The Design Expert 13.0 statistical analysis software was used to conduct regression analysis and significance test on the test data. Taking the process parameter combination without upper heating structure crank rotation speed 195 r/min, trough width 92 mm, feed quantity 75kg/h～85kg/h as the test parameter range, through the iterative optimization of the upper heating test group, the optimal process parameter combination was finally obtained: crank rotation speed 198 r/min, trough width 90 mm, feed quantity 80 kg/h. Under the condition of these optimal parameters, the comprehensive effect of fixation and strip-shaping was the best. A verification test was carried out after adjusting the process parameters of the test prototype to the optimized values. The results showed that the strip-forming rate reached 89.62%, the sensory score reached 90.67 points, and the relative error between the actual measured values of the test and the predicted values of the optimization model was controlled within 5%, which confirmed the accuracy and reliability of the parameter optimization results. Through structural improvement and parameter optimization, this study effectively solved the technical defects of the existing fixation and strip-shaping machines. The research results can provide important theoretical reference and practical guidance for the structural innovation design and process parameter optimization of fixation and strip-shaping machines.