A vehicular multi-link tilt back mechanism configured to be mounted to a rear frame and a front frame of a tricycle, with the rear frame spaced from the front frame along a longitudinal axis, with the vehicular multi-link tilt back mechanism comprising: an axle fixed to the rear frame and extending along the longitudinal axis; a rotary member fixed to the front frame, wherein the rotary member is rotatably mounted around the axle, wherein the rotary member and the front frame of the tricycle are jointly pivotable about the longitudinal axis relative to the rear frame; a right link unit connected between the rear frame and a right side of the rotary member, wherein the right link unit includes a right cushioning member; and a left link unit connected between the rear frame and a left side of the rotary member, wherein the left link unit includes a left cushioning member, wherein when the rotary member is in an original, non-tilt position relative to the rear frame, the right and left link units (3, 4) are not actuated, wherein when the tricycle is turning rightward, the rotary member and the front frame jointly pivot rightward about the longitudinal axis relative to the rear frame, the right cushioning member is actuated to reduce a rightward and inward speed of the rotary member and the front frame, and wherein when the tricycle is turning leftward, the rotary member and the front frame jointly pivot leftward about the longitudinal axis relative to the rear frame, the left cushioning member is actuated to reduce a leftward and inward speed of the rotary member and the front frame, wherein the right link unit further includes a first link and a second link, wherein the first link includes a first end pivotably and directly connected to the rear frame and a second end pivotably and directly connected to a first end of the right cushioning member, wherein the second link includes a first end pivotably and directly connected between the first and second ends (31a, 31b) of the first link, wherein the second link further includes a second end pivotably and directly connected to the rotary member, and wherein the right cushioning member further includes a second end pivotably connected to the rear frame, wherein the left link unit further includes a third link and a fourth link, wherein the third link includes a first end pivotably and directly connected to the rear frame and a second end pivotably and directly connected to a first end of the left cushioning member, wherein the fourth link includes a first end pivotably and directly connected between the first and second ends (41a, 41b) of the third link, wherein the fourth link further includes a second end pivotably and directly connected to the rotary member, and wherein the left cushioning member further includes a second end pivotably connected to the rear frame. an axle fixed to the rear frame and extending along the longitudinal axis; a rotary member fixed to the front frame, wherein the rotary member is rotatably mounted around the axle, wherein the rotary member and the front frame of the tricycle are jointly pivotable about the longitudinal axis relative to the rear frame; a right link unit connected between the rear frame and a right side of the rotary member, wherein the right link unit includes a right cushioning member; and a left link unit connected between the rear frame and a left side of the rotary member, wherein the left link unit includes a left cushioning member, wherein when the rotary member is in an original, non-tilt position relative to the rear frame, the right and left link units (3, 4) are not actuated, wherein when the tricycle is turning rightward, the rotary member and the front frame jointly pivot rightward about the longitudinal axis relative to the rear frame, the right cushioning member is actuated to reduce a rightward and inward speed of the rotary member and the front frame, and wherein when the tricycle is turning leftward, the rotary member and the front frame jointly pivot leftward about the longitudinal axis relative to the rear frame, the left cushioning member is actuated to reduce a leftward and inward speed of the rotary member and the front frame, wherein the right link unit further includes a first link and a second link, wherein the first link includes a first end pivotably and directly connected to the rear frame and a second end pivotably and directly connected to a first end of the right cushioning member, wherein the second link includes a first end pivotably and directly connected between the first and second ends (31a, 31b) of the first link, wherein the second link further includes a second end pivotably and directly connected to the rotary member, and wherein the right cushioning member further includes a second end pivotably connected to the rear frame, wherein the left link unit further includes a third link and a fourth link, wherein the third link includes a first end pivotably and directly connected to the rear frame and a second end pivotably and directly connected to a first end of the left cushioning member, wherein the fourth link includes a first end pivotably and directly connected between the first and second ends (41a, 41b) of the third link, wherein the fourth link further includes a second end pivotably and directly connected to the rotary member, and wherein the left cushioning member further includes a second end pivotably connected to the rear frame.