Sweeper based on combination of rolling and suction actions

The utility model discloses a city road sweeper which represents a sweeper on the combination of rolling and suction actions. The city road sweeper consists of an electric vehicle body portion, a rolling portion and a suction portion. When in operation, the rolling portion and the suction portion are lowered to the extent that a rolling brush, a vertical brush and a dust extraction port can remain in proper positions with respect to the ground; the electric vehicle body is driven by a power driving device to move forward; and separate cleaning of large and small (light and heavy) garbage is realized in such a manner that large and heavy garbage ranging from ball-shaped objects, through large pieces, to block-shaped objects, such as leaves, spitballs and small stones is swept by a rolling system at the front end of the bottom part of the vehicle body to a shovel bucket, and then transferred to a dustbin through a conveyor belt, whereas small and light garbage such as dust, scraps and the like, which are the re