Method and device for calibrating slow timing clock and terminal

Embodiment of the invention discloses a method and a device for calibrating a slow timing clock and a terminal and relates to the technical field of telecommunication. The method and the device are invented for solving the problem that the mobile phone terminal cannot enter a sleep state in time and therefore shortens the sleep time of the mobile phone terminal and increases the power consumption thereof in the prior art. The method for calibrating the slow timing clock comprises the following steps of: obtaining a high speed clock signal and a slow clock signal, wherein the high speed clock signal is more than 13MHz; and calibrating the timing of the slow timing clock according to the high speed clock signal. In the embodiment of the invention, the power consumption of the mobile phone terminal can be greatly reduced and the clock precision can be improved.