Abstract: Based on analyzing construction of shrub layer in 10 types of forestry community in the spruce-broad-leaved mixed geobotanical zone of Moscow state indicating that construction of shrub layer is first decided by the biological characteristics of the shrubs else, the construction of shrub layer is being formed by crown density of tree layer, environmental heterogeneity (soil water and soil ferility et al. ) and coverage of young tree layer in forestry community in different degree. Results showed that vertical distribution of shrub layer in the different spruce-broadleaved mixed forestical community have three geometric types-pyramid, rhombus and triangle upside down. The horizontal distribution of shrubs is mostly clumped or random with the tendency of clumped as the majority.