The invention relates to a high WOB anti-deviation well straightening drill assembly comprises: a bit, a drill thick in lower part, a drill collar and a centralizer, the dill collar comprises a rill collar thin in the lower part, a rill collar thin in the upper part, a rill collar thin in the upper part, the bit, the drill thick in the lower part, the drill collar thin in the lower part , the centralizer, the drill collar thin in the upper part, the drill collar thick in the upper part is connected in turn. The device structure is simple, and is assembled with the common drill, the production cost and using cost are low, the performance is stable, other risks can't be taken to the drilling operation in the using process; the combination structure of the drill thick in the lower part, the drill collar thin in the lower part , the centralizer, the drill collar thin in the upper part, the drill collar thick in the upper part exerts a strong pendulum force to the drill to promote the organic unification of the two kinds of effect of anti-deviation well straightening which is the drill cutting face to the angle drop direction, the effect of anti-deviation well straightening is better, the anti-deviation effect is more obvious when the drill pressure is bigger, the performance is not limited by the downhole condition, the drilling speed can be increased; the device is also applied to the straight hole, the application scope is broad.