The invention provides an instant messaging notification method and device. The method comprises the following steps: when instant messaging arrives, obtaining a notification volume difference of the instant messaging; comparing the notification volume difference with a preset volume value; if the notification volume difference is larger than the preset volume value, generating a motor control instruction; and controlling the vibration intensity of a motor to reach preset vibration intensity according to the motor control instruction. The instant messaging notification method provided by the invention can be used for controlling the vibration intensity of the motor to reach the highest vibration intensity according to the environment of a mobile terminal, so that when the mobile terminal is in a noisy environment, the user can be guaranteed to perceive an incoming call or an instant messaging message, and thus the user will not miss the incoming call or delay to check the instant messaging message, which brings great convenience to the user and enhances the user experience.