The invention discloses a high strength nodular cast iron pole and a preparation technology thereof. The preparation technology is characterized by comprising the following steps: (1) preparation before pole casting, to be specific, preparation of raw materials, smelting of iron, adding of alloying elements and nodulizing; (2) a pole casting procedure, to be specific, casting and inoculation treatment; and (3) heat treatment. The invention also provides the high strength nodular cast iron pole prepared by adopting the preparation technology, comprising multiple tower poles which are sequentially connected in an inserted manner, wherein each tower pole is a cone-frustum hollow column which has the conicity of 1000:11-26; the top end of the high strength nodular cast iron pole is equipped with a tower cap. The high strength nodular cast iron pole has the advantages of high bearing capacity, thin wall thickness, light weight, low manufacturing cost and the like.