Embodiments of this application relate to a cell access method and apparatus, and a device, and the method includes: obtaining a movement speed of a terminal; determining a signal strength offset value based on the movement speed; obtaining signal strength of a serving cell and signal strength of at least one neighboring cell, where the serving cell is a cell on which the terminal currently camps, and the neighboring cell is a cell in which the terminal can receive a signal; determining whether a sum of signal strength of a first neighboring cell in the at least one neighboring cell and the offset value is greater than or equal to a preset threshold; and if the sum of the signal strength of the first neighboring cell and the offset value is greater than or equal to the preset threshold, accessing, by the terminal, the first neighboring cell. The cell access method and apparatus and the device provided in the embodiments of this application can resolve a problem of frequent network disconnection of the terminal in a high-speed movement process, so that a call completion rate of the terminal can be improved.