Steel structure supporting column for building construction

The utility model discloses a building construction steel structure supporting column which is characterized in that a plurality of cooling pipes are fixedly arranged on the supporting column, the cooling pipes are vertically arranged, water spraying heads are arranged at the tops of the cooling pipes, the bottoms of the cooling pipes are connected to a main pipe connector and connected with a water supply pipe through the main pipe connector, the tail end of the water supply pipe is connected with a water pump, and the inlet end of the water pump is connected with a water source. A built-in groove corresponding to the main pipe connector is formed in the supporting seat, the main pipe connector is clamped into the built-in groove, a control box is arranged on the supporting seat, a switch and a control piece are arranged in the control box, the switch is used for controlling the water pump, and the control piece is made of bimetallic strips with different thermal expansion coefficients and bends to touch the