The utility model discloses a rectangular planar super large-span pre-stressed spacial pipe truss roof, which is formed by connecting super large-span support brace bar type diagonal self-balancing spacial pipe trusses; a plane of the roof is a rectangular plane of which a ratio of a long side L1 to a short side L2 L1/L2 is more than or equal to 1.5; the length of the span of the roof is L2 whichis more than or equal to 90 meters and less than or equal to 150 meters; each super large-span support brace bar type diagonal self-balancing spacial pipe truss takes a fusiform special pipe truss formed by connecting an upper chord, a lower chord and a diagonal web member as a basic frame; two ends of the basic frame are respectively fixed on a cast-steel node; and each cast-steel node is also connected with an upper support rod, an outside brace rod and a lower support rod; steel cables are supported by two steel cable steering supports and then respectively support two upper support rods and two outside brace rods; and the height of a central structure of the fusiform special pipe truss h is more than or equal to L2/18 and less than or equal to L2/16. The utility model is suitable for the roof of which the ratio of the long side to the short side of a building L1/L2 is more than or equal to 1.5 and the length of the span L2 is more than or equal to 90 meters and less than or equal to 150 meters. The rectangular planar super large-span pre-stressed spacial pipe truss roof has the advantages of low height of the structure, small internal force, low steel consumption, low construction cost and the like.