The intricacy of diagnosing mango leaf disease is compounded by the multiplicity of crop types, variations in agricultural disease markers, and a multitude of environmental factors. Because they are infrequently utilized for early identification of many illnesses, existing solutions frequently rely on localized data. Farmers can avoid significant financial losses by taking immediate action to solve these problems. The novel image processing-based method for detecting mango leaf disease is explained in this paper. When the Proposed Convolutional Neural Network (CNN) model was used in the study, it achieved an amazing 97.92% accuracy in this unique scenario. The capacity of the model to differentiate between various leaf states was proven by a thorough series of experiments conducted on both healthy and damaged mango leaves. This technique provides a quick and effective way to detect diseases early on by making it easier to determine whether images of mango tree leaves are healthy or infected. This new approach may significantly enhance plant disease identification and treatment. Additionally, it raises the prospect of using comparable technologies in other agricultural settings, which might improve disease control and benefit the mango sector.