Prompting officials' innovation willingness is a prerequisite for processes of public sector innovation. This article constructs a framework explaining officials' innovation willingness by linking environmental antecedents and path dependence. The empirical analysis, based on an original survey of 403 officials and interviews with 102 officials in China, shows that their innovation willingness is mostly driven by factors within the bureaucratic system, i.e. top-down and horizontal drivers but less so by bottom-up drivers. Moreover, officials with previous innovation experience tend to have more innovation willingness but are less driven by top-down factors. This study advances the theory of innovation willingness generation.