Anthracnose is a disease of chilli plants that caused by the fungus Colletotrichum sp., this disease is found in many chili plantations, especially in South Sulawesi, besides that this anthracnose disease can cause damage with attack intensity ranging from 25% - 100%. The results of interviews conducted with farmer in controlling farmers use synthetic fungicides with spraying intensity once a week. The overuse of synthetic fungicide can have many adverse effects on the environment. Therefore, one of the alternatives that can be done is to use vegetable pesticides derived from plant extracts. It is known that Maja Fruit (Aegle marmelos) contains polyphenols that are toxic to fungi and crown flower Leaf (Calatropis gigantea L.) contains tannin compounds that have the function of as antifungal and Trichoderma sp is one of the biological control fungi. This study used a completely randomised design (CRD). The treatments used were different concentrations of mixed extracts of Maja fruit (Aegle marmelos) and crown flower leaf (Calatropis gigantea L.), namely 0% (control), 1%, 3%, 5% and 7%. The stages of this research are laboratory and field research with stages, namely making PDA media, isolation of Colletotrichum sp. fungi, Antagonist Test and Synergy Test of plant extracts and Trichoderma sp The test results showed a high presentation of inhibition against Colletotrichum sp. Is Trichoderma sp Namely 74%, while Gliocladium sp. 57% and Aspergillus sp. 56%. And in the synergy test between mixed plant extracts of Maja Fruit (Aegle marmelos) and crown flower Leaf (Calatropis gigantea L.) and Trichoderma sp. In suppressing the growth and development of the fungi Colletotrichum gloeosporioides at concentrations of 1%, 3%, 5% and 7% the test results show the best concentration at a concentration of 5%.