The utility model relates to a square strength nature column assembling type template system that cross -section is adjustable, by the rectangle structure that four face mould boards are formed, through angle steel positioning piece connected between per two face mould boards, the vertical orientation of angle steel setting element is equipped with a plurality of evenly distributed's rectangular channel, is equipped with the spacing crossbeam of a plurality of at the surface of face mould board, and take a seat respectively in the rectangular channel in the both ends of spacing crossbeam, with perpendicular connection of spacing crossbeam that corresponds on the adjacent face mould board, wherein the face mould board comprises a plurality of standard cell template and a non - standard cell template interconnect, spacing crossbeam is pegged graft by outer square steel and interior square steel and is formed to length according to the spacing crossbeam of width regulation of face mould board. This template system the turnover in the use damaged condition low, construction speed is fast, assistance measures is few, requires relatively lowly to operation personnel's operant level, is suitable for the construction requirements that square composite steel concrete column cross -section changes simultaneously, energy -concerving and environment -protective have better economic benefits and a social.