The invention discloses a panel supporting mechanism which comprises a middle frame, a connecting rod and a panel, wherein the middle frame comprises three lug bosses and a rotating shaft hole; three lug bosses form two sections of cambered grooves which are communicated and have the same bending direction; a groove is arranged on one lug boss of a converged position of two sections of the cambered grooves; two connecting rod shafts are arranged on the connecting rod; two rotary arms are arranged on the panel; a rotary arm is connected with the rotating shaft hole of the middle frame; the other rotary arm is connected with one connecting rod shaft; the other connecting rod shaft is glidingly connected with the cambered groove; under the rotation of the panel along the rotating shaft hole,the connecting rod shaft is driven to slide in the cambered groove through the rotary arm, slides to the converged position and is clamped in the groove; and one lug boss is also connected with an elastic rib which is contacted with the connecting rod shaft after the panel is closed. The panel supporting mechanism has convenient opening and closing and good supporting effect, can not have the occurrence of falling and is convenient to operate.