A double radiation source frame structure used in a container examining system includes a horizontal accelerator, a vertical accelerator and a gantry frame formed by two right and left posts and two up and down cross beams characterizing that the fronts for the horizontal and vertical accelerators are set with a horizontal and a vertical collimators fixed on the left post and the up cross beam of the gantry frame separately, light beams limited by the two collimators are different and parallel two planes. A double-detector arm is mounted on the right post set with a detector module for beams limited by the collimators.