The present invention discloses an assembled pet toilet using a disposable sanitary urine-absorbing pad, comprising: a frame and a hook bonding material disposed on a lower surface of the frame and configured to bond to the disposable sanitary urine-absorbing pad. The frame can be formed by assembling four corner sockets and four insert rods. The sanitary urine-absorbing pad can be quickly and conveniently fixed or removed. Besides, the assembled pet toilet is convenient for packaging, transporting or carrying.