A plane display with foldable support. The plane display comprises a base and a back plate mounted on a plane display panel. The back plate pivots onto the base through a bolt. The back plate has a fixing piece and a first arm. An operating rod movably connected to the fixing piece and the first arm slides between a first position and a second position. When the operating rod is in the first position, the back plate is fixed to the base at a first angle. When the operating rod is located in the second position, the operating rod releases the back plate from the base, such that the back plate rotates with respect to the base to a second angle.