In this work, we discuss the questions of the block constitution of natural structures, which were consid ered previously, particularly in [1]. Below, we give the development of these ideas referred both to microscale and macroscale media, and examples of correctness of this structure are presented. It seems likely that a new mechanism describing the formation of block struc tures is suggested.1. The observation of both natural and artificial objects (bodies) leads to the conclusion that the struc turing of space and time (processes) is a fundamental characteristic of the surrounding world. The discrete ness of natural and industrial objects manifests itself both in external sizes and in the internal structure of the bodies (informy, or the internal form). The dis creteness of phenomena manifests itself in the period icity of processes and random fluctuations. For natural structures, a hierarchy of element sizes is revealed and the ratio of linear sizes of elements belonging to levels neighboring by hierarchy is 2-5 [1].This ratio, with rare exceptions, is followed over the entire range of observed sizes from microscopic to astronomic in the world of bodies (subjects). The objects are structured for both inorganic bodies and organic ones and for biological objects. For example, in the organic world, we observe the following chain: quarks, superstrings → elementary particles → atoms → simple (complex) molecules → cells → plants → mul ticellular living organisms → social groups (families → societies). We can assume that, in the overall size ranges of objects, general regularities of structure for mation act. These regularities operate despite the sig nificant and principal difference between the concrete physicochemical mechanisms of structure formation in various size ranges.One more circumstance can be found in favor of the block structuring of the world. It consists in the possibility to describe certain quantitative characteris tics of block structures, from quantum mechanical scales to geochemical ones, by single type mathemat ical models. In a series of studies [2, 3] and other works by these authors, a theory of block structures based on a new differential factorization method was con structed. The theory is based on the introduction of either a rectangular shaped block element for the two Abstract-Questions on the formation of block structures are considered. It is shown that the block structure is characteristic of bodies in a wide range of scales from microscopic to astronomic and from the bodies of nonliving nature to living organisms and communities. A scheme of the mechanism of the probabilistic for mation of block structures is suggested. The characteristics general for structures of all scales are revealed. Evidence is presented that the hierarchical pattern of element sizes is characteristic of natural structures in which the ratio of linear sizes of elements neighboring by hierarchy is 2-5, while the characteristic scale coef ficient is , where N is the total number of elements of which the system ...