The steel pipe roof truss made of cold-formed thin-walled steel has the advantages of light structure, good rigidity, saving steel, and can give full play to the material strength, especially in the pressure rod and support system controlled by the slenderness ratio. Buildings with this structure are basically public buildings. The structure has the characteristics of beautiful appearance (can be built into flat shape, circular arch shape, arbitrary curved shape), convenient production and installation, good structural stability, high roof rigidity, and good economic effect.