The invention discloses a rapid garment dehydrator which comprises a dehydrator case. An extrusion chamber and a power chamber are arranged inside the dehydrator case. A partition plate is arranged between the extrusion chamber and the power chamber. A plurality of extrusion plates are arranged inside the extrusion chamber. Pull rods penetrate through the two edges of the extrusion plates, the pull rods perpendicularly penetrate through all the extrusion plates and the partition plate, and the extrusion plate farthest away from the partition plate is fixedly connected with the pull rods; a spring is arranged between every two adjacent extrusion plates, a spring is also arranged between the partition plate and the extrusion plate adjacent to the partition plate, and the springs sleeve the pull rods; dehydration bags are placed between the every two adjacent extrusion plates and between the partition plate and the extrusion plate adjacent to the partition plate; each dehydration bag comprises a surface layer, a water absorbing layer and a water permeating layer. Multiple drowned dehydration bags can be placed into the extrusion chamber at the same time, drowned garments can be rapidly extruded and dehydrated, use is convenient and sanitary, the manufacturing cost is low, and use and popularization are facilitated.