The hair on the black back is of medium length. The surface hair is thick, straight and hard and lies flat against the body. The lower layer of hair is soft and wool-like and can keep out the cold. The length of the hair on the back is usually between 2.5 cm and 5 cm. This length will neither appear too fluffy nor too short, but will present a coordinated and beautiful appearance. Therefore, the hair length of the black back is moderate.

However, if the hair length of the black back is too long or too short, it may be disqualified. During the maintenance process, the owner needs to comb the black back's hair regularly to keep it tidy and beautiful. At the same time, the Black Back's diet and health will also affect the growth and quality of its hair, so owners need to pay attention to providing a balanced diet and appropriate exercise to maintain the Black Back's health.