Maxtop water’s water-based quenching fluid uses polyalkylene glycol (PAG) as a thickener, adding functional agents such as anti-rust agents, defoaming agents, bactericides and PH regulators, and water to prepare water-soluble quenching fluids of different concentrations. The cooling speed is between water and oil. Water-based quenching fluids with different contents and water mixing ratios can be customized according to customer requirements.