The utility model discloses a drag for lance, it includes: the cylinder that has the front and back end, wear to establish the lance pole in the cylinder, the lance pole has an axis, and the lance pole can slide in the cylinder, forms a cavity between lance pole and the cylinder, fixed connection is in the awl that draws of lance pole front end, the lance pole with draw the awl in offer a runner that runs through along the axis direction of lance pole, be linked together through a trompil between cavity and the runner, set up the guide in the cavity, the guide cover is established outside the lance pole, and the outside of guide is provided with first inclined plane, and first inclined plane is reduced to the rear end by the front end of cylinder, the elastic component, the one end of elastic component offsets with the rear end of cylinder, and the other end and the lance pole of elastic component are connected, the setting is at the joint spare of cylinder front end, and the inboard of joint spare is provided with the second inclined plane with the corresponding conflict in first inclined plane, and joint spare is the motion of relative guide under the guide effect on first inclined plane and second inclined plane. This drag for lance can avoid its drag for obtain behind the junk can't the unfreezing can not the back -off, the problem that can't safe withdraw from.