“In the process of achieving carbon peak and emission reduction targets, biomass coupled power generation is a key measure. Through Aspen Plus software modeling and analysis, the influence of equivalence ratio and environmental pressure on the composition of syngas gas was studied, and the variation laws of syngas calorific value and energy were explored. The results indicate that the calorific value of synthetic gas reaches its highest value when the equivalence ratio is between 0.3 and 0.35, which is the optimal equivalence ratio range for biomass coupled gasification systems.”