This paper proposes interference suppression strategies for Low Earth Orbit (LEO) multi-satellite communication systems. A two-dimensional satellite-cell matching algorithm based on a utility function is introduced to mitigate partial interference. Additionally, a beam hopping (BH) pattern optimization algorithm is developed using satellite priority to minimize inter-satellite interference and enable collab-orative BH transmission. To further suppress interference and address the impact of imperfect channel state information (CSI), a robust precoding algorithm lever-aging multi-satellite cooperation is presented. Numerical results validate the effectiveness of the proposed algorithms in interference suppression, demonstrating their resilience in channel estimation errors. Index Terms—Low Earth Orbit(LEO), multi-satellite communication systems, beam hopping(BH), robust precoding.