The invention relates to a pesticide composite containing schizonepeta and tobacco extract, a preparation method and an application, belonging to the field of pesticides. The invention aims at providing the pesticide composite containing the schizonepeta and tobacco extract, the preparation method and the application. In the pesticide composite, active components can be extracted by the following raw medicinal materials in parts by weight: 1 part of schizonepeta and 0.5-6 parts of tobacco; the active components can be prepared by mixing the schizonepeta and the tobacco and extracting in common; the schizonepeta can be firstly and independently extracted to obtain schizonepeta extract, the tobacco is independently extracted to obtain the tobacco extract, and then the two types of extracts are mixed to obtain the pesticide composite. The pesticide composite can play a good role in killing homoptera and hemiptera pests such as scale insect, aphid, trialeurodes vaporariorum and lygus lucorum and has positive significance in agricultural production.