The utility model discloses an unwinding inspection machine used for inspecting defect of fabrics, which comprises a rack, a rotating shaft used for conveying the fabrics, a power mechanism used for driving the rotating shaft to rotate and a lamp lighting device (5) used for lighting the defects of the inspected fabrics. The power mechanism comprises a motor (1), a speed reducer (2), and a transmission component; wherein, the motor (1) is connected with the transmission component through the speed reducer (2), and the transmission component is connected with the rotating shaft. The rotating shaft comprises a first driving rotating shaft (6), a first driven rotated shaft (8), a first driving rotating shaft (7) and a second driven rotated shaft (9) respectively arranged at the two sides of the rack. The unwinding inspection machine has simple structure, low cost and convenient operation, and can be used for inspecting the fabrics knitted by the circular knitting machine, brings convenience to the inspection of inspectors, saves the labor time and improves the work efficiency.