Normal walking involves shifting the body's center of mass (CoM) forward in order to walk more efficiently. Unfortunately, people with paraplegia cannot voluntarily control their CoM due to their inability to move their legs or waist. Powered exoskeletons have been considered as one of the major lower limb assistive devices and developed to assist people with paraplegia to walk again. However, powered exoskeletons have limited degrees of freedom (DoFs), so they cannot fully assist with CoM control without the aid of physical therapists. Therefore, it is challenging for people with paraplegia to completely control their CoM for walking, even with the assistance of a powered exoskeleton.To address this issue, this paper focused on improving the walking autonomy of people with paraplegia wearing powered exoskeletons. Therefore, we propose a new gait pattern method that utilizes a leaning posture to effectively shift the body's CoM forward of people with paraplegia wearing powered exoskeletons. By taking advantage of the height difference between the leading and trailing leg, the proposed method facilitates the movement of the body's CoM forward during walking. To assess the efficacy of the proposed gait pattern method, the user's trunk was tilted up to 2 degrees. During the preswing phase, for every one-degree increase in the angle of the trunk tilt, the initial frontal acceleration of the user's CoM maximally rose up to 16%.