The invention discloses a combined type special-shaped office desk, which comprises a base, a support post, a rotating seat, a positioning box and a top cover in sequential arrangement, wherein the base comprises an installing seat and support rods uniformly distributed at the bottom end of the installing seat; the support post comprises a center rod; a special shaped post matched with a special shaped groove is arranged at the bottom end of the center rod; the rotating seat is arranged between the support plate and the position limiting plate; the positioning box is of a regular hexagonal structure; the top cover comprises a regular hexagonal cover plate. The optional rotating seat structure is used; a conventional office desk is structurally designed again; the appearance is attractive; in addition, through the addition of separation plates, the desk body storage space is effectively divided; office articles can be fast and conveniently stored; in the assembly process, under the mutual effect of a first magnetic suction sheet and a second magnetic suction sheet, the desk body can be effectively fixed; the assembly is fast and convenient; the time and the labor are saved; great convenience is brought to the office life.