Research object: the process of industrial enterprises that carry out the diversification of its activities; The purpose of work: synthesis and development of theoretical and methodological foundations, development of practical recommendations on strategic planning of industrial enterprises in the diversification of activities; Research methodology and instruments: a systematic approach, analysis and synthesis, cluster analysis, factor analysis, taxonomic analysis, analytic hierarchy method, expert evaluations, the method of average ranks, graphics; Theoretical and practical results: composition of strategic card business that is unlike existing involves three aspects: financial - with the allocation diversification strategy, customer and internal processes, which included aspects of training and development; methodical approach to integrated assessment of industrial enterprises in terms of diversification, which is the difference in the selection of partial indicators that characterize the diversification of activity in the following areas: financial, production, employment, innovation and investment, marketing, generalization integral factors in taxonomy; the methodical distribution of enterprise resources based on the single criterion of maximum use in such areas as financial, production, employment, innovation and investment, marketing, using the analytic hierarchy and select the type of diversification - related or unrelated; definition of diversification of enterprise activity as direction of good governance, which provides a combination of different types of activities that ensures minimal risk while maximizing profits; definition of strategic planning of diversification of enterprise activity as a management decision with respect to the reorientation of the enterprise on other than the primary, way of development by allocating resources in the most promising areas of activity, taking into account the financial capabilities of the enterprise and the state of internal and external environment; composition and content of the main elements of the diversification of the industrial enterprise activity, which feature consists in the selection of priority processes, resources and entities that have significant impacts on the diversification of activities; list of criteria for evaluation of the strategy of diversification through the inclusion of additional criterion of «efficient allocation of resources in the enterprise according to the spheres of activity»; Degree of introduction: developments are implemented in practical work of OJSC «Turboatom», LLC «Manometer-Ukraine», KNUE within the research agenda on the theme «Managing innovation enterprise»; The sphere of application: activities of industrial enterprises in the conditions of diversification, the learning process.