The utility model discloses a fence made of polyvinyl chloride (PVC) wood-plastic section bars. The fence comprises an upright column, main square tubes transversely connected with the upper end of the upright column, and a plurality of auxiliary square tubes which are positioned below each main square tube and transversely connected with the upright column, wherein a metallic main connecting tube is arranged in the center in the upright column; the orifice of the main connecting tube is positioned below the orifice of the upright column and covered by an inverted U-shaped connecting piece or a cross connecting piece; the orifice of the upright column is covered by a column head; one main insertion port or more than two main insertion ports is/are formed on the side wall of one side or the side walls of more than two sides of the upright column, which is/are flush with the orifice of the main connecting tube; one main square tube or more than two main square tubes is/are inserted into one main insertion port or more than two main insertion ports; a metallic auxiliary connecting tube which penetrates through the whole main square tube is arranged in each main square tube; and the lower wall of each auxiliary connecting tube extends out of each main square tube and is connected with the surface of the bottom edge of the inverted U-shaped connecting piece through a screw, or is connected with the surface of each connecting end of the cross connecting piece through a screw. The fence has attractive appearance and a firm structure and is widely applied.