The invention discloses a Chrysanthemum / carnation pest control agent, relating to the technical field of pest controlling. The Chrysanthemum / carnation pest control agent is prepared from the following raw materials in parts by weight: 30-35 parts of purslane, 25-30 parts of loquat leaf, 15-20 parts of Chinese Toon Sprout, 15-20 parts of lophatherum gracile, 10-15 parts of Begonia evansiania, 10-15 parts of bunge pricklyash leaves, 10-15 parts of Coptis chinensis, 10-15 parts of maltodextrin, 8-12 parts of flavouring agents, 8-12 parts of palm wax, 6-10 parts of calamine, 5-8 parts of vinegar residues, 3-5 parts of sodium sulfate, 3-5 parts of copper sulphide, 2-4 parts of sodium chloride, 1-2 parts of realgar, 1-2 parts of mustard powder, 20-25 parts of glycerinum and 600-800 parts of water. The Chrysanthemum / carnation pest control agent prepared by the invention can effectively prevent and treat pests, has the characteristics of quick response and long half-life period, has high use safety, is beneficial for improving pesticide application condition and does not influence the ornamental value of Chrysanthemum and carnation.