The invention provides a 3D printing device which can be suitable for a rugged construction base panel and can walk. The 3D printing device comprises a vehicle body, a power device, a walking device, a printing support, a printing head and a printing stabilization system; the vehicle body is provided with the power device, the walking device and the printing support, the walking device is powered by the power device and drives the vehicle body to move, and the printing head is installed on the printing support; the printing stabilization system comprises a fluctuation sensor, a processor and a position adjusting device; the fluctuation sensor senses motion state signals and transmits the motion state signals to the processor, the processor receives the motion state signals and commands the position adjusting device to conduct adjustment, and a preset motion state is kept; and the position adjusting device conducts position adjustment according to commands of the processor, and the printing head is kept work according to the preset motion state.