The utility model provides a flag raising device controlled by a single-chip microcontroller, which belongs to an improved flag raising device. A flag rod is fixed on a seat, the upper part of the flag rod is provided with a driven rotary wheel, the shaft of a stepping motor arranged on the seat is provided with a driving rotary wheel, the driving rotary wheel is connected with the driven rotary wheel through a wire, the stepping motor is electrically connected with a control circuit arranged in an electric control case, the control circuit is provided with the single-chip microcontroller, the input end of the single-chip microcontroller is electrically connected with a keyboard circuit and a power supply circuit, the output end of the single-chip microcontroller is electrically connected with an H bridge motor drive circuit module, the H bridge motor drive circuit module is electrically connected with the stepping motor, and the single-chip microcontroller is also electrically connected with an EEPROM module. The flag raising device solves the problem that the national flag raising and the national anthem playing are asynchronous, realizes the mechanization and automation of the national flag raising, reduces the labor intensity of the national flag raising and lowering and is convenient for operation; and the adoption of the stepping motor improves the accuracy in controlling the raising and the lowering of the national flag.