The present invention provides a curved display device, a method for manufacturing a curved display device and an electronic device. The curved display device may comprise a first curved light-transmitting substrate, a second curved light-transmitting substrate arranged opposite to the first curved light-transmitting substrate and a sealant having a particular width distribution which is located between the first curved light-transmitting substrate and the second curved light-transmitting substrate and coated along edges of the first curved light-transmitting substrate and the second curved light-transmitting substrate. The sealant having particular width distribution enables the first curved light-transmitting substrate to adhere to the second curved light-transmitting substrate, and reduces the stresses in the first curved light-transmitting substrate and the second curved light-transmitting substrate, while changing the stress distributions of the first curved light-transmitting substrate and the second curved light-transmitting substrate.