The invention discloses an aluminum alloy sectional material used for an automotive body and a manufacturing method. The aluminum alloy sectional material is composed of the raw materials of, by mass, 0.13-0.17% of Si, 0.13-0.17% of Fe, 0.09-0.12% of Cu, 0.04-0.06% of Mn, 0.6-0.8% of Mg, 0.018-0.022% of Cr, 5.5%-5.8% of Zn, 0.15-0.195% of Zr, 0.027-0.033% of Ti and the balance Al, wherein the content of other single element is less than or equal to 0.05%, and the total content of other elements is less than or equal to 0.15%. The manufacturing method comprises the steps of smelting, purification treatment, rod forming through casting, homogenizing annealing, extruding, drawing, natural aging treatment, artificial aging treatment and other procedures, so that the material achieves good static collision effect, is quite suitable for manufacturing aluminum alloy crash boxes and longitudinal beams of automobile bumper systems, has the good mechanical performance and good abrasion resistance, fatigue resistance and anti-crash performance (static and dynamic collision impact performance), and can be put into mas production.