The invention relates to an environment-friendly water-based cleaning agent, which includes: a non-ionic surfactant, organic alcohol, alkyl glycoside, organic sodium carboxylate, a corrosion inhibition additive, and water. The cleaning agent is suitable for precise cleaning on products made of stainless steel, plastic and glass and the like, can be completely dissolved, is residual-free, is low-foam and is easy to rinse, can remove oil dirt, dust and other dirt on the products, and is anti-static and has strong cleaning function and good cleaning effect. The cleaning agent is free of controlled harmful substances such as heavy metals, phosphorus and nitrites, etc, and also has corrosion inhibition effect on metals; biodegradability rate reaches 100%. The products cleaned with the cleaningagent hardly have residual dirt and change on glossiness; meanwhile, the products have service life. The cleaning agent is green, environment-friendly and toxic-free, is harmless, and is free of influence on body health and pollution on environment.