The invention belongs to the technical field of a bridge attachment, in particular to a bridge expansion joint with multidirectional displacement function, wherein a fixed comb jointing unit and a movable expansion comb jointing unit are unit modules, horizontal mutual-insert ratcheting connection pairs are formed at the clearance end of two adjacent beam bodies, a fixed comb body is arranged in a T-shaped way, a movable comb body is arranged in a reversed-T-shaped way, not only can the horizontal displacement requirement for a longitudinal bridge direction be satisfied, but also through a related flexible connection, the rotation of the movable expansion comb jointing unit relative to a rotating bearer of a mounting seat, the transverse bridge direction sliding in a sliding groove, and the rotation relative to a connecting shaft are satisfied, therefore the outstanding features of the requirements for the longitudinal direction, transverse direction, twisting, vertical turning and seismic displacement of the bridge, the concrete pouring is not required, the requirement for the rabbet depth is reduced, the installation is rapid and convenient, the installation engineering jobs are fully optimized, and the construction efficiency and the safety are improved.