The invention discloses a floor sweeper with an adjustable baffle. The floor sweeper comprises a housing and a handle, wherein a motor, a rotary shaft and a floor sweeping roller brush are arranged inthe housing, the floor sweeping roller brush is installed on the rotary shaft, an output shaft of the motor is in driving connection with the rotary shaft, an annular groove is formed in the handle,a stopping block matched with the annular groove is arranged in the housing, the handle is connected with the housing through matching between the annular groove and the stopping block, the baffle matched with the floor sweeping roller brush is also arranged on the housing, the cross section of the baffle is arc-shaped, one end of the baffle downwards extends to form a side wall, the baffle is inrotary connection with the housing through the side wall, a guiding groove is formed in the baffle, a guiding block matched with the guiding groove is arranged on the housing, multiple limiting holesare formed in the side wall of the baffle, limiting holes are uniformly distributed in the side wall of the baffle circumferentially, and positioning blocks matched with the limiting holes are arranged on the housing. The baffle of the floor sweeper can be freely adjusted, and the use demand can be very well met.