Abstract: Objective This paper used plantar pressure analysis equipment to discuss the plantar pressure distribution pattern and balance ability of patients with the knee joint injury under static standing.Methods Zebris FDM-S plantar pressure analysis equipment was used to collect plantar pressure data from subjects with the knee joint injury and healthy control subjects. We compared the pressure values in each region of pelma, and then assessing the balance ability of the subjects based on the trajectory of the overall pressure center movement.Results Compared with the healthy control group, patients with knee joint injury have a significantly lower pressure in the heel areas and a significantly higher pressure in the middle foot area. And the total pressure of the injured limb foot in the patient group is lower than that in the contralateral foot. In addition, there is a significant increase in the parameters of the balance ability index in the patient group.Conclusions The plantar pressure distribution pattern of patients with knee joint injury is different from that of normal people in static standing, and the balance ability is poor. Therefore, this method has a positive guiding significance in the evaluation and application of knee joint injury.