The invention provides a force-reducing pile clamping box, which comprises a box body, and is characterized in that two vertical hinge shafts oppositely arranged are arranged in the box body, and each hinge shaft is staggeredly hinged with two groups of arc pile clamping anchor ears which respectively extend towards the two sides; each group of pile clamping anchor ears and a group of pile clamping anchor ears positioned at the same side on the other hinge shaft are staggeredly inserted to form overlapping areas, and a limit block is arranged in the middle of the pile clamping anchor ear; a reset spring is arranged between the limit block and the top of the adjacent pile clamping anchor ear, and wedge-shaped through holes are arranged at the overlapping areas of the pile clamping anchor ears and the other group of pile clamping anchor ears; and vertical wedge-shaped force-adding pins corresponding to the shape of the wedge-shaped through holes are arranged above the wedge-shaped through holes and are arranged at the tail end of an oil cylinder rod. The invention uses the pile clamping anchor ear to replace the pile clamping jaw in the prior art, and the wedge-shaped force-adding pins move downwards to force all the pile clamping anchor ears to inward contract so as to sandwich the pile body; and the structure is simple, thereby, the cost is low, the fault is few, and the force exerted on the pile clamping anchor ears is uniform.