The utility model discloses an architectural engineering technology field especially relates to a dark frame post of light steel in door and window entrance to a cave, including light steel stand of a H type and the light steel stand of the 2nd H type, be equipped with the light steel lintel of U type between light steel stand of a H type and the light steel stand of the 2nd H type, be equipped with a plurality of drawknot band steel group relatively in the outside of light steel stand of a H type and the light steel stand of the 2nd H type, it is equipped with the prevention wood piece respectively to insert in the inboard of light steel stand of a H type and the light steel stand of the 2nd H type. The utility model discloses the creative light steel of adoption replaces the concrete as the constructional column, can reduce the process in the work progress, has that the recruitment is few, the work efficiency is high, the time limit for a project is short, low in cost just can carry out the advantage controlled to the quality.