The embodiment of the invention discloses a background application cleaning method and device, a storage medium and electronic equipment. The method comprises the steps that a sample vector of an application is calculated on the basis of a linear discriminant analysis algorithm to obtain an optimal projection vector, current feature information and the sample vector are projected through the optimal projection vector, a prediction result is generated according to the projection result, and whether the application can be cleaned or not is determined according to the prediction result. In this way, the background application can be automatically cleaned.