A brush head (2, 50) capable of performing reciprocating rotation comprises a brush head housing (22, 52) and a driving wheel (27, 37A, 37B, 57). A top hole (221, 521) and/or a central through hole (223, 523) are/is distributed on the brush head housing (22, 52) in a centering manner. The center line(s) of the top hole (221, 521) and/or the central through hole (223, 523) and a revolution axis (L1) of a brush head driving shaft are located at a same line, and the brush head driving shaft (26, 56) penetrates through the central through hole (223, 523). Driving wheel through holes (272, 372A, 372B, 572) are distributed on the driving wheel (27, 37A, 37B, 57). After part of the brush head driving shaft (26, 36A, 36B, 56) passes through the driving wheel through holes (272, 372a, 372b, 572), the fitted region of the brush head driving shaft (26, 36A, 36B, 56) and the driving wheel (27, 37A, 37B, 57) enters the driving wheel through holes (272, 372A, 372B, 572), so as to enable the brush head driving shaft (26, 36A, 36B, 56) and the driving wheel (27, 37A, 37B, 57) to be fixedly linked. A brush plate protrusion (245, 345) formed along a revolution axis (L2) of the brush plate and towards the direction far away from a cleaning element (25, 55A, 55B) is distributed on a brush plate (24, 34, 54A, 54B). A driven wheel driven part (243, 343) matching a driving wheel driving part (271, 371A, 371B) is distributed on the brush plate protrusion (245, 345). A brush plate hollow region (241, 341, 541A, 541B) is formed on the brush plate protrusion (245, 345) along the direction of the revolution axis (L1) of the brush head driving shaft. The brush head driving shaft (26, 56) penetrates through or enters the brush plate hollow region (241, 341, 541A, 541B) and limits the brush plate (24, 34, 54A, 54B) to move along the revolution axis (L2) of the brush plate and towards the direction of the cleaning element (25, 55A, 55B). The brush plate (24, 34, 54A, 54B) is incapable of performin
