The invention provides a medium-thick-walled heat shrink tube automatic feeding and labeling device. The medium-thick-walled heat shrink tube automatic feeding and labeling device comprises a rack (1)and a feeding module (3). The feeding module (3) is installed and fixed to the rack (1). The feeding module (3) comprises a left mounting rack (31), a right mounting rack (33), a bottom plate (35), two guide rods (37), a funnel (43), a motor assembly (45), a linear slide rail (47), a sliding block (49), a cylinder assembly (51), an idle wheel assembly (53) and a synchronous belt (55). The left mounting rack (31) is installed and fixed to the left end of the rack (1). The right mounting rack (33) is installed and fixed to the right end of the rack (1). The bottom plate (35) is horizontally installed and fixed to the top ends of the left mounting rack (31) and the right mounting rack (33). The bottom plate (35) is integrally kept horizontal. A strip-shaped straight slot (352) is formed in the bottom plate (35) in the left-right direction. The medium-thick-walled heat shrink tube automatic feeding and labeling device is used for achieving expanding, cutting, feeding and labeling of a heat shrink tube on one production line.