Abstract:County put forward the proposition of county public S T decision-making governance under the rule of law, is exploring the characteristics in the process of rule by law in China, combined with live by the rule of law construction experience summary and logical extension. This paper firstly puts forward the propositions of county public S T decision-making governance under the rule of law and builds the study assumptions on the proposition. Secondly, based on the AHFY county ecological environment decision and used the regression analysis of OLS and 2SLS to validate the relationship proposition. Finally, from the perspectives of trigger source, strategic propeller to complete the cause analysis and countermeasures.