Ultrasound-assisted extraction of polysaccharides from mulberry leaves

► Extraction conditions of UAE of polysaccharides from mulberry leaves were optimised. ► Compared with MAE and CSE, UAE had a larger yield of polysaccharides. ► Polysaccharides extracted from the three methods showed similar physicochemical characteristics. ► Polysaccharides extracted by the three methods showed similar FT-IR spectra. ► Structure of MPS-1 and MPS-2 was preliminary researched by FT-IR, GPC and GC analysis.