The invention relates to a multifunctional pipeline robot which comprises an advancing device, a sweeping device and a control circuit board. A driving device is arranged on the advancing device. The multifunctional pipeline robot further comprises a planetary wheel set A arranged on the advancing device and a planetary wheel set B arranged on the sweeping device, the advancing device is connected with the sweeping device through a spring, and a walking device pushes the sweeping device to advance in a pipeline. When the sweeping device encounters a curve, the spring can be net, and a steering function of the whole robot is achieved. Due to the fact that the walking device and the sweeping device are separately arranged, the length of the whole pipeline robot is quite decreased, and the phenomenon that the pipeline robot is clamped in the curve does not easily occur. The driving device adopts a worm wheel and worm structure, when the pipeline robot stops at a certain position in a vertically pipeline to perform sweeping or detection, a worm wheel does not drive a worm to rotate by utilizing the self-locking performance of the worm wheel and worm structure, and the phenomenon that driving wheel cannot reversely rotate and accordingly the pipeline robot slips down can be avoided.