The invention discloses a system for cleaning and treating recycled PET bottle chips with high cleanliness. The system comprises a first pre-washing device, a first grinding device, an air separation device, a vibratory screening device, a cleaning device, a rinsing device, an output device, and a rinsing water processing subsystem. The first pre-washing device, the first grinding device, the air separation device, the vibratory screening device, the cleaning device, the rinsing device and the output device are connected in sequence; and the rinsing water processing subsystem recycles the rinsing water from the rinsing device, and sends the water back to one or two or three of the first pre-washing device, the rinsing device and the cleaning device for reutilization after the rinsing water is filtered and purified. The PEC bottle chip cleaning and treating system fully takes impurities, pollutants, etc. in the recycled PEC bottle into consideration, and utilizes each device to clean the bottle with pertinence, thus obtaining PET bottle chips with high cleanliness; and the subsystem is adopted to treat and recycle the water, thus reutilizing waste water, greatly improving the reutilization rate of waste water and greatly saving the water resource.