The pathological features of BPH are characterized by both deficient Qi’s stagnation，which are caused by the deficiency of Qi. The pathogenesis of benign prostatic hyperplasia is from the deficiency of positive Qi and in the development of the disease，the deficient Qi and the pathological products "blood stasis, phlegm and dampness" are entangled. The pathological characteristics of deficiency of its root and sufficiency of its surface are highly consistent with the connotation of the theory of "deficient Qi’s stagnation". Based on this, this paper proposes the principle of regulating both deficiency and excess in the treatment of BPH, with the aim of restoring Qi to its normal state while activating blood and removing blood stasis and phlegm and dampness to eliminate pathological conditions. It also explores the role of androgen in the "deficient Qi’s stagnation" theory and the Chinese medicine treatment based on this, in order to provide new ideas for the treatment of BPH.