A ground cleaner, comprising: a handle main body and a cleaning apparatus connected with the handle main body, and the cleaning apparatus comprises: a housing, a rolling brush, an air suction pipeline and a cleaning assembly; wherein, the air suction pipeline comprises an air suction port, and the air suction port is close to and faces a rolling brush surface; the cleaning assembly is located above the air suction port, and the cleaning assembly faces the rolling brush; the cleaning assembly comprises a cleaning medium inlet and a plurality of cleaning medium spray orifices, the cleaning medium inlet is communicated with the plurality of cleaning medium spray orifices via a flow channel; wherein the ground cleaner is characterized in that the flow channel comprises a first-layer flow channel branch, a second-layer flow channel, and a third-layer flow channel; the first-layer flow channel branch comprises a first-layer cleaning medium spray orifice, the second-layer flow channel comprises a second-layer cleaning medium spray orifice, and the third-layer flow channel comprises a third-layer cleaning medium spray orifice; the first-layer cleaning medium spray orifice is connected with the cleaning medium inlet via the first-layer flow channel branch, the second-layer cleaning medium spray orifice is connected with the first-layer cleaning medium spray orifice via the second-layer flow channel branch, and the third-layer cleaning medium spray orifice is connected with the second-layer cleaning medium spray orifice via the third-layer flow channel branch; and the first-layer flow channel branch, the second-layer flow channel branch and the third-layer flow channel branch comprise a first-layer flow channel branch main body, a second-layer flow channel branch main body and a third-layer flow channel branch main body, respectively, and channel branch main bodies of each layer are parts in which cleaning medium flows in two opposite directions; wherein the first-layer flow channel branch main body and the third-layer flow channel branch main body are located at same side with regard to the second-layer flow channel branch main body. a handle main body and a cleaning apparatus connected with the handle main body, and the cleaning apparatus comprises: a housing, a rolling brush, an air suction pipeline and a cleaning assembly; wherein, the air suction pipeline comprises an air suction port, and the air suction port is close to and faces a rolling brush surface; the cleaning assembly is located above the air suction port, and the cleaning assembly faces the rolling brush; the cleaning assembly comprises a cleaning medium inlet and a plurality of cleaning medium spray orifices, the cleaning medium inlet is communicated with the plurality of cleaning medium spray orifices via a flow channel; wherein the ground cleaner is characterized in that the flow channel comprises a first-layer flow channel branch, a second-layer flow channel, and a third-layer flow channel; the first-layer flow channel branch comprises a first-layer cleaning medium spray orifice, the second-layer flow channel comprises a second-layer cleaning medium spray orifice, and the third-layer flow channel comprises a third-layer cleaning medium spray orifice; the first-layer cleaning medium spray orifice is connected with the cleaning medium inlet via the first-layer flow channel branch, the second-layer cleaning medium spray orifice is connected with the first-layer cleaning medium spray orifice via the second-layer flow channel branch, and the third-layer cleaning medium spray orifice is connected with the second-layer cleaning medium spray orifice via the third-layer flow channel branch; and the first-layer flow channel branch, the second-layer flow channel branch and the third-layer flow channel branch comprise a first-layer flow channel branch main body, a second-layer flow channel branch main body and a third-layer flow channel branch main body, respectively, and channel branch main bodies of each layer are parts in which cleaning medium flows in two opposite directions; wherein the first-layer flow channel branch main body and the third-layer flow channel branch main body are located at same side with regard to the second-layer flow channel branch main body.