The invention relates to a friction roller cloth inspecting machine. The friction roller cloth inspecting machine mainly comprises a cloth loosening rotating shaft, a workbench, a driving roller and a cloth rolling rotating shaft. The cloth loosening rotating shaft is mounted at the top end of the workbench, the cloth rolling rotating shaft is mounted at the bottom end of the workbench, and the driving roller and cloth can be kept in static friction all the time. A friction roller is mounted on the workbench, and the friction roller comprises a detection shaft and friction ring pieces. The detection shaft is sleeved with a cluster of friction ring pieces, and all the friction ring pieces can rotate around the detection shaft in a relatively independent mode. A scanning module is further mounted above the detection shaft, and contacts on the scanning module and the circumference faces of the friction ring pieces are in one-to-one correspondence and are kept in contact with each other. The driving roller is electrically connected with the scanning module. The friction roller cloth inspecting machine can be used for inspecting cloth efficiently and automatically, and is small in error rate, capable of saving the labor cost and particularly suitable for the cloth which is coarse in texture.