The invention discloses a method and device for incoming call reminding of a smart phone, wherein the method and device achieve incoming call reminding through the smart phone with an OLED screen. The method comprises the following steps that S0, phone numbers stored in the smart phone are grouped to form at least one phone number set, and the corresponding relation is built between each phone number set and one area on the OLED screen; S1, when the smart phone is in a standby state with the OLED screen closed, and if incoming call exists, the phone number of the call is obtained; S2, whether the incoming phone number is a phone number in the phone number sets or not is detected; S3, pixel points in the area, having the corresponding relation with the phone number set to which the incoming phone number belongs, on the OLED screen are lightened. The method and device for incoming call reminding of the smart phone have the advantages that not only can system resources of the phone be utilized reasonably when the phone gets an incoming call, but also a user can intuitively know the identity of a caller according to the display areas and display modes of the OLED screen.