Controllable Human-Object Interaction Synthesis (CHOIS) is an advanced technology that simultaneously generates object and human movements based on linguistic descriptions, initial object and human states, and sparse object trajectory points. This technology is crucial for simulating realistic human behavior, particularly in scenarios that require precise hand-object contact and appropriate ground-supported interactions. CHOIS improves the matching between generated object movements and input object trajectory points by introducing object geometric loss as supplementary supervisory information and designing guiding terms during the training and sampling process of the diffusion model to enforce contact constraints, thereby ensuring the authenticity of the interactions.