Crop-Livestock Integration (CLI) through biomass exchanges between crop and livestock enhances the sustainability of mixed farming systems, improving production, autonomy, efficiency and recycling. By analysing the diversity and recent changes in mixed farms and modelling potential CLI pratices changes, we assess the effect of these changes on farm performance and sustainability in Ðiện Biên District, Northwest Vietnam. CLI enables farms to improve animal feed and environmental performances if pressure on land resources remains minimal. High pressure on pasture land may force pasture-dependent farms to cease animal production despite support for forage development. Agroforestry (fruits and forage) could enhance animal feed and farm performance with high-value products, though still its innovative stage. The results show that local authorities must continue to develop innovative models for the production and conservation of forage and crop residues, while also devising additional strategies to support resource-constrained farms. It suggests exploring new forage production systems and biomass management between farms with a broader district-level vision.