The invention relates to the technical field of electromechanical control, and specifically relates to an unfreezing reminding device for foods in a refrigerator. The unfreezing reminding device is arranged in the refrigerator, and comprises a fixed support seat, a tank body, a detection device, a reminding device, a communication module and a single chip microcomputer, wherein the tank body is arranged on the fixed support seat; the reminding device, the communication module and the detection device are connected with the single chip microcomputer separately; the detection device is arrangedin the tank body and used for detecting whether ice in the tank body is unfrozen into a liquid or not; and the single chip microcomputer is used for receiving an unfreezing signal sent by the detection device, and sending an alarming command to the reminding device to send an alarming signal, and carries out data interaction with a mobile phone client of a user through the communication module. The unfreezing reminding device for the foods in the refrigerator is capable of effectively monitoring whether the foods in the refrigerator are unfrozen or not; and the whole device is simple in structure, convenient to install, applicable to various refrigerators, without the need of changing the structure of the refrigerator, and wide in applicability.