Pareto Set Learning (PSL) is an emerging research area in multi-objective optimization.Existing PSL methods are limited to addressing a single Multi-objective Optimization Problem (MOP) at a time.A Collaborative Pareto Set Learning (CoPSL) framework is proposed to learn the Pareto sets of multiple MOPs simultaneously.CoPSL efficiently learns the Pareto sets of multiple MOPs, leveraging shared representations and improving approximation capabilities.