The invention provides a mosquito-repellent itching-relieving and swelling-elimination plant extract which comprises the following components: wormwood hydrosol, lemon hydrosol, eucalyptus citriodorahydrosol, clove hydrosol, camellia seed hydrosol, catmint hydrosol, thyme hydrosol, geranium hydrosol, rosemary hydrosol, citronella hydrosol, pungent litse fruit hydrosol, lavender hydrosol, lithospermum hydrosol, salvia sclarea hydrosol, spearmint hydrosol, cypress hydrosol, platycladus orientalis hydrosol, calendula officinalis hydrosol, cedar hydrosol, juniper berry hydrosol, wild chrysanthemum flos hydrosol, motherwort hydrosol, eucommia ulmoides hydrosol, jasmine hydrosol, eucalyptus hydrosol, valerian hydrosol, rose hydrosol, sweet-scented osmanthus hydrosol and lemon-grass hydrosol. The plant extract is remarkable in mosquito repellent effect, is capable of effectively preventing inflammation and removing swelling, not only is capable of meeting the customer requirement of plant mosquito repelling, but also has effects of itching reliving and swelling elimination.