The invention particularly relates to a paper label suction and conveying mechanism. The paper label suction and conveying mechanism comprises a pneumatic label cylinder (1), a swing cylinder (2), a synchronous belt transmission device (3), a support saddle (4), a mechanical hand (5) and a rotating shaft (26), wherein a synchronous belt wheel II (23) of the synchronous belt transmission device (3) is connected with the swing cylinder (2), a synchronous belt wheel I (21) is connected with the rotating shaft (26), and the rotating shaft (26) is movably connected with the support saddle (4); and the mechanical hand (5) comprises a cylinder (6) and a vacuum paw combination (7), the vacuum paw combination (7) comprises a cylinder connecting rod (8) and a vacuum sucking disc (9), the cylinder (6) is connected with the rotating shaft (26), the cylinder connecting rod (8) is respectively connected with the cylinder (6) and the vacuum sucking disc (9), an airway hole (8-1) is formed in the cylinder connecting rod (8), and one end of the airway hole (8-1) is communicated with the vacuum sucking disc (9). The paper label suction and conveying mechanism disclosed by the invention has the advantages of high production efficiency of placing label paper, low cost, high speed and good quality.