Drinking water pipe cleaning agent, and cleaning and maintenance methods of drinking water pipe

The invention provides a water pipe cleaning agent. The water pipe cleaning agent is prepared from the components in parts by weight:12-50 parts of natural organic acid, 10-50 parts of citric acid, 10-15 parts of natural surfactants, 10-15 parts of natural sterilizing agents, and 10-25 parts of water. According to the water pipe cleaning agent, the cleaning agent produces physical and chemical reactions with water scale, iron rust and sludge on the inner wall of a water pipe, thus the water scale, the iron rust and the sludge can be effectively removed, and efficient sterilization is achieved. The water pipe cleaning agent is prepared from edible materials, secondary pollution to the water pipe is avoided, and even if the cleaning agent remains, no damage is caused to a human body; and the cleaning process is easy and convenient, cleaning equipment is simple and easy to obtain, the costs of the cleaning agent and the cleaning process are low, the acceptance degree is high, and the water pipe cleaning agent is