<p>This study makes up the research gap in the previous literature on the effect and mechanism of the different leadership styles on organizational process innovation. In addition, this study incorporates the roles of market knowledge and organizational cohesion. In this study, 160 tourism enterprises were taken as samples to explore the effect of transformational leadership and transactional leadership on process innovation, with the mediating mechanism of market knowledge and the moderating effect of organizational cohesion. The results demonstrated market organizational knowledge plays an intermediary role in the relationship between leadership style and process innovation. While both transformational and transactional leadership have a positive impact on market knowledge, transformational leadership shows a significantly greater impact than transactional leadership. The results also confirmed that organizational cohesion moderated the relationship between market knowledge and process innovation. When organizational cohesion is high, the positive relationship between market knowledge and process innovation will be strengthened.</p>