Structure of a self-lifting toilet seat

An improved structure of a self-lifting toilet seat, said seat having two lateral sides with a cavity opening rearwardly at the near rear section of each side and the rear end thereof being connected to a securing seat for pivotal movement thereabout, two liquid boxes provided with a partitioning board within each box so as to isolate a plurality of slots to contain liquid and the slots being intercommunicated and the securing seat being connected to an adjustable sliding seat for accommodating toilet bowls of various sizes, characterized in that a front section of each liquid box is installed in each cavity of the toilet seat and the front section of each box carries a protrusion which forms a securing board which is pivotally attached in each cavity by means of a securing element to pivotally mount at the pivotal hole of the cavity so that the front of the liquid box is formed into an actuating pivot.