This series of resins is water-soluble rosin ester solution. Using stabilized rosin resin as the primary raw material and water as the solvent, the products contain no organic solvents and emit no VOCs, making them environmentally friendly. They feature good storage stability and exhibit broad compatibility with various water-based synthetic polymer systems such as acrylic emulsions, EVA emulsions, NBR, and SBR. The resins can improve wetting on substrates, and increase bonding strength with materials.