Assembly type building constructional column

The invention discloses an assembly type building constructional column. Particularly, a triangle is formed among two adjacent oblique supporting rods and a sleeve, bending resistance is improved, under extremely terrible conditions such as earthquakes or strong winds, falling resistance and inclination resistance of the constructional column are great, and the problem that in the prior art, thereare still defects in bending resistance of supporting assemblies is effectively solved. The constructional column comprises a bottom fixed plate poured in a concrete building, a stand column, the sleeve, the oblique supporting rods, retaining rings and bearing steel bars. The bottom fixed plate is rectangular or round, the center of the bottom fixed plate is fixedly connected with the stand column through four reinforcing ribs, the sleeve is arranged on the stand column, the multiple oblique supporting rods which are arranged obliquely are fixed to the outer round surface of the sleeve, everytwo adjacent oblique supp