The invention provides a water-saving closetool for interior finish. The closetool comprises a supporting base, a closetool seat, a bed pan and a connecting device, wherein the closetool seat is arranged at the upper portion of the back portion of the supporting base; the bed pan is arranged in the supporting base; the connecting device is arranged at the lower end of a discharge pipe of the bed pan, the connecting device is used for being connected to a drain pipe arranged on the ground, so that the discharge pipe is reliably and closely connected with the drain pipe, thereby being convenientfor sewage discharge, and facilitating the disassembly of the discharge pipe and drain pipe. The water-saving closetool for interior finish has the advantages that the assembly and disassembly are simple, convenient and quick, and the connection is reliable.