Fabricated base structure

The utility model relates to a fabricated base structure comprising a base plate, a support and a top plate, wherein the bottom of the support is arranged on the base plate; the top part of the support is arranged on the top plate; the base plate comprises a plurality of n-type U-bars and two groups of base plate beams, the n-type U-bars are arranged in parallel, and each group of base plate beams comprises two angle steels which are oppositely arranged; the support is in a taper structure with a small top part and a large bottom, and the taper structure of the support is formed by four main support beams; and at least one transverse support beam is horizontally arranged between every two adjacent main support beams, and at least one first inclined support beam is obliquely arranged between every two adjacent main support beams. The fabricated base structure is an all-steel structure, and is in bolted connection; each fabricated base structure is not heavier than 70kg, and is about 3m long; the fabricated bas