Exposed type column base joint component for mounting steel column

An exposed type column base joint component for mounting a steel column comprises a square steel bottom plate (1), a set of vertical square steel pipes (2) which are arranged in the middle of the steel bottom plate and arrayed orderly in a grid shape, a set of isosceles trapezoid stiffening plates (3) which are transversely inserted between every two adjacent square steel pipes in a penetrating mode and of which the lower bottoms are arranged on the steel bottom plate, a set of right trapezoid stiffening plates (4) which are longitudinally inserted between every two adjacent square steel pipesof the square steel pipes in the front and rear rows and of which the lower bottoms are arranged on the steel bottom plate, a set of rectangular stiffening plates (5) which are longitudinally inserted between every two adjacent square steel pipes of the square steel pipes in the middle row and of which the lower bottoms are arranged on the steel bottom plate, and anchor holes (6) which are uniformly formed in the periphe