A notification message preview method includes displaying, by an electronic device, a notification message in the message group on a first card, where the message group includes N notification messages, and other notification messages in the message group are hidden, receiving, by the electronic device, a preset operation from a user on the first card, and displaying, in response to the preset operation; by the electronic device, M notification messages in the message group on a second card, where the M notification messages are M of the N notification messages, and where the M notification messages include the notification message.