The invention discloses a quick well formation device in a soft soil layer, comprising a plurality of joints of hollow
drill rods which are mutually connected for forming a well and then used as a well wall and a hollow
drill bit which is connected with the last joint of the hollow
drill rod, wherein a filter cylinder is arranged in the hollow drill rods, the filter cylinder is connected with thelast joint of the hollow drill rod by clamping, and the hollow drill rods are mutually connected through
pipe hoops. As the plurality of joints of well formation device a plurality of joints which aremutually connected for forming the well and then used as the well wall are adopted, the drill rods can be used as the well wall without being lifted out, after forming the well, the filter cylinder can be arranged downwards in the hollow drill rods after forming holes, clamped at the bottom of the
drill bit and used for directly pumping underground water, the pumping of the underground water cannot be affected by the increase of the depth, the increase of the pressure and the deformation of the well wall, the reasonable setting of the
porosity of filter holes on the filter cylinder can ensure the smooth collection of water samples, and the setting of a
settling chamber at the lower end of the filter cylinder can settle
sediment and prevent the filter holes from being blocked. The quick well formation device can quickly complete the well formation in the soft soil layer region within the underground depth of 10m; and compared with the existing drilling and the artificial excavation, the quick well formation device can save the investment in human resources and
material resources, greatly improve the working efficiency and avoid the well wall collapse accidents.