The investigations of pathomorphologic changes in muscular, tendinous and fascial tissues of lower extremities in spastic cerebral palsy have been carried out. Revealed changes were the following: expressed unripeness of all the elements of both muscular and dense fibrous tissues, growing with the age of the patients, and underdevelopment and regression of all the tissues — structure violation, cellular compound, blood perfusion. Described data demand from surgeons to reform less traumatic, strictly measured, sparing operations.