The utility model relates to a vehicle suspension technical field, in particular to fall front suspension deflection mechanism of tricycle. The utility model discloses steering linkage adopts the disalignment to arrange, and forms parallelogram configuration between steering linkage and the upper and lower arm of suspension, has effectively reduced to turn to that rotate the angle error about the in -process and cantilever swing in -process vehicle is prenex changes, has improved the vehicle operation stability that traveles, and wheel wear is rateed about having reduced, and the use reliability obtains great improvement.