The invention relates to a single pole moving and swinging type public transportation trolley bus pantograph in the technical field of transportation; in the invention, the power output end of a swinging driving device is connected with a guide rail bracket which is hinged with and supported on a chassis; the chassis is provided with a pantograph top bar and a moving pantograph driving device; the pantograph top bar, under the effect of the moving pantograph driving device, can move in the transverse and lateral directions vertical to the driving direction of the public transportation trolley bus to extend out of the bus roof; bi-polar pantograph bodiesare respectively supported at the lower part of the pantograph top bar by an insulator; the bi-polar pantograph bodies are mutually insulated, thus forming a double power receiving body, the guide rail bracket and the moving pantograph driving device; the pantograph top bar, under the effect of the swinging and driving device, can swing and lift; as a result, the bi-polar pantograph bodies can respectively approach and closely contact the double conductors to receive power. The invention features simple structure, beautiful waiting lounge, no restrictions imposed on passing vehicles and safe and reliable operation.