A method of training an image decomposition model, an apparatus of training an image decomposition model, a method of decomposing an image, an electronic device, and a storage medium are provided, which may be applied to a field of an image processing technology. The method of training the image decomposition model includes: acquiring a training set; inputting a first training image into the first adversarial neural network and inputting a second training image into the second adversarial neural network, so as to determine a first loss function value; inputting a third training image into the first adversarial neural network and the second adversarial neural network respectively, so as to determine a second loss function value; determining a third loss function value according to a comparison result between an acquired fusion image and the third training image, where the fusion image is generated by fusing a generated image of the first adversarial neural network with a generated image of the second adversarial neural network; and adjusting a parameter of the image decomposition model according to at least one of the first to third loss function values, until a training end condition is met, where the first loss function, the second loss function and the third loss function meet a predetermined weight relationship.