Power transmission tower fabricated foundation for mire environment and construction method of power transmission tower fabricated foundation

The invention discloses a power transmission tower assembly type foundation for a mire environment. The power transmission tower assembly type foundation comprises a base, prefabricated concrete columns, fixing bolts and spiral anchors. The base is a hemispherical inverted-bowl-shaped base, a lower flange plate is fixed to the top face of the base, and a pouring hole and a plurality of reserved holes are formed in the hemispherical face of the base. An upper flange plate is fixed to the bottom end of the concrete column and is in bolted connection with the lower flange plate, and foundation bolts are embedded in the top of the upper flange plate. The fixing bolts are arranged in the preformed holes; and the top end of the spiral anchor extends into the preformed hole and is bolted through a fixing bolt. The foundation is prefabricated in a factory and assembled on site, so that the problems of large land acquisition area, long time, high cost, difficulty in drainage of a foundation pit in summer construction,