The invention relates to the technical field of washing agents and in particular relates to a fruit and vegetable washing agent containing jellyfish polysaccharide extract. The fruit and vegetable washing agent is prepared from the following components: alkyl glucoside, sucrose fatty acid monoester, sodium dodecyl sulfonate, hydroxymethyl cellulose, citric acid, the jellyfish polysaccharide extract, a lubricant, a viscosity regulator, a preservative, essence and de-ionized water, wherein the viscosity regulator is a mixture of xanthan gum, ethylene glycol and sodium alginate according to the equal mass ratio; the lubricant is magnesium stearate or potassium stearate; the preservative is one of sorbic acid, potassium sorbate, sodium sorbate and benzoic acid; the jellyfish polysaccharide extract is a special polysaccharide substance extracted from umbrella parts of jellyfish; the substance has a good adsorption property on various chemical substances in pesticide residues so that the cleaning effect of the fruit and vegetable washing agent on the pesticide residues can be greatly improved.