Abstract: The present invention relates to an efficient silicate solubilizing Streptomyces sp. CS13-6 with a preservation No. of CGMCC No. 25523, which has high capabilities of silicate solubilization, dissolving phosphorus and potassium, fixing nitrogen, and producing siderophore and IAA. The strain can grow well at pH 5-10 and 20-40° C. In addition, it can grow normally when the NaCl content is 4%, and has high acid, alkali and salt resistance and wide temperature adaptability. The present invention further discloses use of the strain in promoting plant growth, improving soil quality and the like. The strain can be used as an active ingredient for preparation of biological silicon fertilizers, soil conditioners, etc., so as to effectively improve the nutrient structure in the soil, improve soil quality, reduce the use of chemical fertilizers, and achieve a purpose of improving quality and increasing yield.