The utility model discloses a fluid dewatering device, including and importing pipe filters unit, electromagnetism coalescence unit and the coalescer unit of arranging in proper order in the fluid transmission pipeline's of (23) to fluid export (24) the direction along fluid, the fluid among the fluid transmission pipeline filters in the pipe filters unit to make the free water coalescence in the fluid in electromagnetism coalescence unit, finally dewater through the coalescer unit. Fluid dewatering device is for sled massing device, and including long square bottom plate, each functional unit arranges along the length direction of bottom plate in proper order, but both serial operation of each monomer in the sled piece, again can independent operation, have the characteristics of nimble operation, satisfy the diversified demand of producing. Fluid dewatering device still includes along operation panel (8) that the periphery of bottom plate was upwards built, the operation that makes things convenient for the field operation personnel with observe downwards etc. Conveniently again filter loading of filter core. Whole device compact structure, area is little, and be convenient for transportation and installation reduce the site work volume.