Objective    To investigate the configuration of the blood supply system in human knee cruciate ligament.     Methods    Twelve cruciate ligaments derived from the knee joints of 6 healthy adult cadavers were observed under naked eyes

and then dissected and observed under a microscope. Three groups of anterior cruciate ligaments and posterior cruciate ligaments

randomly selected from the twelve cruciate ligaments

were observed through histotomy and HE staining.      Results    Blood vessels were found throughout the human knee cruciate ligaments

and the calibers of the blood vessels varied between 0.03±0.01 mm and 0.09±0.02 mm in different segments. Blood vessels and adipose tissues were abundantly found in the bands between the anterior cruciate ligaments and posterior cruciate ligaments

and the surface blood vessel calibers were not larger than 0.18±0.04 mm.     Conclusion    The human knee cruciate ligaments possess enough blood vessels to show promise in self repair.