The invention discloses a buckling suspension mechanism for a water outlet device, which is connected with a support arm extending out of a wall. The buckling suspension mechanism comprises a sucker mechanism, a suspension tube, a support hoop and an elastic buckle, wherein the sucker mechanism can be adhered to the wall; the suspension tube is provided with a lower end part and an upper end part, the lower end part is fixedly connected with the sucker mechanism, and the upper end part is provided with a locking hole which is perforated from inside to outside; the support hoop comprises a connecting sleeve and two connecting pieces, the connecting sleeve is provided with an axial groove which is perforated from inside to outside, the two connecting pieces are fixedly connected with the connecting sleeve and symmetrically positioned at the left and right sides of the groove, and each connecting piece is provided with a through hole which is perforated from left to right; the elastic buckle is arranged between the two connecting pieces of the support loop and provided with convex columns; the connecting sleeve is sheathed outside the support arm; and the two connecting pieces are inserted into the upper end port of the suspension tube, so that the convex columns of the elastic buckle extend out of the through holes and are inserted into the locking hole under the action of elastic force, and the connecting sleeve can tightly hold the support arm.