The invention provides an industrial washing and dewatering machine with an automatic detection function. The machine comprises a machine body, an outer cylinder and an online blood detection device.The full-automatic washing and dewatering machine has the washing, rinsing and dewatering functions; the outer cylinder extends in the front and back direction, a front opening is formed in the end surface of the outer cylinder, and a side opening can be formed in the circumference wall of the outer cylinder; the online blood detection device is arranged on the circumference wall or a back end cover of the outer cylinder, used for detecting the blood content in a washing solution in the washing process, and connected with a controller. According to the industrial washing and dewatering machinewith the automatic detection function, the blood content in the washing solution can be detected online in real time, the washing and sensing programs are controlled according to a detection result,and the clothes reach the required washing cleanliness. The washing program is intelligently controlled through the automatic detection function, washed clothes meet the requirement of the washing cleanliness, bacterial infection caused by bloodstain residue is effectively avoided, water and time are saved, and the washing work efficiency is improved.