Abstract: Aramid and ultra-high molecular weight polyethylene (UHMWPE) fiber fabric bags were designed for the disposal of improvised explosive device (IED). The implosion test was carried out, and a finite element (FE) model of fabric bag implosion was established. The anti-explosion abilities of the two fabric bags were compared from the perspectives of external overpressure and critical thickness, and the effects of the initial implosion distance and the thickness of the fabric bag on the anti-explosion ability were analyzed. The results show that the main failure modes of the fabric bag under implosion load are broken hole in the center area and the failure of the sealing zipper. The critical thickness of the fabric bag increases approximately linearly with the charge in the range of 20-100 g TNT charge. The critical thickness of the aramid fabric bag is significantly larger than that of the UHMWPE fabric bag when the charges are the same. The UHMWPE fabric bag has a better anti-explosion ability without considering the influence of the explosion fireball. When the thicknesses are the same, the overpressure outside the aramid fabric bag is smaller, indicating that the overpressure attenuation ability of the aramid fabric bag is better. As the initial implosion distance of the fabric bag increases, the critical thickness decreases. There is an overpressure higher than the human body which can withstand within a certain range outside the fabric bag. Taking the 30 g TNT, 3 mm aramid fabric bag condition as an example, the overpressure at 665 mm from the center of the fabric bag is 34.2 kPa, exceeding the eardrum damage threshold.