Cleaning method for water-based paint conveying system

The invention discloses a cleaning method for a water-based paint conveying system. The method comprises the steps that a to-be-cleaned system is subjected to pure water cleaning, pure water in the to-be-cleaned system is discharged, a first hydrophilic solvent is added into the to-be-cleaned system, the to-be-cleaned system is cleaned, the first hydrophilic solvent in the to-be-cleaned system is discharged, an alkaline solvent is added into the to-be-cleaned system, and the to-be-cleaned system is cleaned. Discharging the alkaline solvent in the to-be-cleaned system, adding a second hydrophilic solvent into the to-be-cleaned system, cleaning the to-be-cleaned system, discharging the second hydrophilic solvent in the to-be-cleaned system, adding pure water into the to-be-cleaned system, and cleaning the to-be-cleaned system; the water-based paint conveying system to be cleaned is cleaned through the hydrophilic solvent, the alkaline solvent and the pure water, so that residual accumulated water-based paint an