Base assembly of double-rolling-brush cleaning device

A base assembly of a double-rolling-brush cleaning device comprises a main support, a dust collecting box, a first rolling brush, a second rolling brush, a driving motor and a transmission mechanism. The first rolling brush and the second rolling brush are rotatably arranged on the front side and the rear side of the main support respectively, and the dust collecting box and the driving motor are both located between the first rolling brush and the second rolling brush. The transmission mechanism comprises a first duplicate gear, a second duplicate gear, a first synchronous pulley, a second synchronous pulley, a first synchronous belt and a second synchronous belt. The first duplicate gear is connected with the driving motor, and the second duplicate gear is rotatably installed on the main support. The first gear part of the first duplicate gear is meshed with the first gear part of the second duplicate gear; a second gear part of the second duplicate gear is connected with a first synchronous pulley through