The invention discloses a section steel column foot connector with a pre-stressed anchor and a construction method of the section steel column foot connector. The section steel column foot connector is cost saving, reasonable in structure, convenient to construct and capable of guaranteeing stability of section steel column feet. The section steel column foot connector comprises a connector body. The connector body comprises the pre-stressed threaded anchor, wherein at least one end of the pre-stressed threaded anchor is arranged in a building foundation. A lower solid plate is arranged on the lower portion, close to the end, of the pre-stressed threaded anchor, and sleeves the pre-stressed threaded anchor. A first nut is arranged on the lower side of the lower solid plate. The upper portion of the first nut is embedded into the lower solid plate partially. Through coordination among the pre-stressed threaded anchor, the solid plate and other components, the defects of conventional section column feet, such as large knots, high material consumption and protrusion of external outlines from decoration surfaces, are overcome effectively; the section steel column foot connector is safe, reasonable and economically feasible.