Abstract: 【Purpose/significance】From the perspective of situation theory, this paper explores the heterogeneous mechanism of differ⁃ ent factors on the public sustainable use behavior of government open data, which is conducive to improving the utilization efficiency of government open data, realizing data value, enabling social economy and public life.【Method/process】This paper constructs an in⁃ tegrated influencing factors framework of the public sustainable use behavior on government open data, and tests the intensity and di⁃ rection of the effects of user factors, task factors, system factors, environmental factors and other factors on the public initial accep⁃ tance behavior and sustainable use behavior under the situation of indistinguishable situation, high task demand situation and low task demand situation.【Result/conclusion】User factor, task factor, system factor, environment factor and initial acceptance behavior factor are the main driving factors of the public sustainable use behavior on government open data in the situation of no distinction and dis⁃ tinction. In the process of changing from high task demand to low task demand, the effect intensity and significance of task factors on the initial acceptance behavior are reduced, and the degree of interpretation of the public continuous use behavior is also reduced. In this scenario, there are other influencing factors that need to be detected.【Innovation/limitation】This paper constructs an integrated influencing factors framework of public continuous use behavior for government open data, and analyzes the heterogeneity based on dif⁃ ferent scenarios. It is necessary to further explore other influencing factors in the context of low task demand.