Ultimate load for an anisotropic body with a macrocrack and a direction of development of a macrocrack are defined independently from each other. Original methods in which basis averaging functions lay, approximations of parameters, characteristic cracks for mechanics, the analysis of the is intense-deformed condition in a vicinity of top of a crack are used. Algorithms of the decision of considered problems are resulted. Also numerical results for thin are resulted is unidirectional the reinforced composit plate of the unlimited sizes, when an initial direction of a macrocrack to in parallel reinforcing fibres.