The invention relates to a bag moving machine with full-automatic bag breaking and discharging functions. According to the technical scheme, a transverse air pipe (9) is horizontally fixed to the upper portion of the right side of a dustproof closed cover (1), the closed end of the transverse air pipe (9) is movably installed into a transverse sleeve (8), the upper end of a longitudinal inner pipe (10) is perpendicularly fixed to the lower surface of the transverse sleeve (8), the longitudinal inner pipe (10) is movably sleeved with a longitudinal outer pipe (11), an internal air absorbing cover (20) is installed at the lower end of the longitudinal outer pipe (11), the working end of a piston rod of a longitudinal motion air cylinder (5) is hinged to the center of an opening of the internal air absorbing cover (20), a bag breaking tool rack (19) is arranged on the lower portion of the dustproof closed cover (1), a bag cutting tool (17) is arranged in the middle of the bag breaking tool rack (19) in the front and back direction, and a left bag breaking tool (18) and a right bag breaking tool (16) are correspondingly installed at the left side and the right side of the bag cutting tool (17). The bag moving mechanism has the advantages of being small in size, good in dust suppression effect, high in discharging efficiency, small in labor intensity, high in automation degree and suitable for bag breaking and discharging for powdery materials.