Аннотация
The purpose of the work is to base the selection of adequate tools of state support for the development of old industrial regionsthe territories on which the industries related to the "outgoing" technological structures are concentrated.It is shown that the complexity of the tools selection aimed at ensuring the economic security of old industrial regions is reasoned by the heterogeneity of their composition.With the application of key postulates of synergetics it is justified that the tools of state support for regional development are most effective if they are used at the bifurcation point.It is argued that the bifurcation state is characterized by an increase in threats to the sustainable functioning and development of the regional socio-economic system and a decrease in the level of economic security in the region.A system of indicators for assessing the economic security state of old industrial territories was proposed, by using of which the nature of their development was diagnosed and it was argued that the regions are instable and objectively need government support in order to reach the trajectory of sustainable socio-economic dynamics.The importance of such selection is proved and as a condition to ensure the success of the transition process carried out by the region the toolkit of differentiated state policy for the development of old industrial regions is proposed.