The invention discloses a space-saving desk for a primary school student. The desk comprises a desktop, a left desk leg, a right desk leg and a middle desk leg, wherein the desktop is of an L-shaped structure; the left desk leg, the right desk leg and the middle desk leg are fixedly connected to the desktop; a retaining plate is arranged around the desktop; the retaining plate is fixedly connected to the desktop; a rotary bookshelf is connected to the upper side of the desktop by virtue of a rotating shaft; the rotary shelf includes two layers; each layer of the rotary bookshelf, around the rotating shaft in the middle, is provided with six book storage grids; a lead wire hole and a pen holder rack are additionally arranged on the desktop; a table lamp holding groove is kept between the lead wire hole and the pen holder rack; a first drawer and a second drawer are arranged below the desktop; a storage cabinet is arranged at the lower side of the first drawer; and storage grids are arranged at the lower side of the second drawer. The desk provided by the invention is reasonable in design, relatively low in cost and convenient for popularization and application.