Grass combing machine

The utility model discloses a grass combing machine, which comprises a separation and reunion handle (1), a handrail (2), a gasoline engine (3), a grass combing base (4), a roller (5), a grass combing cutter shaft (17), a power transmission mechanism (6) and a braking mechanism, wherein the grass combing cutter shaft (17) is rotationally arranged on the grass combing base (4); the power transmission mechanism (6) comprises a small belt pulley (7) which is fixedly connected with a power output shaft of the gasoline engine (3), a large belt pulley (12) which is fixed on the grass combing cutter shaft (17), a tensioning arm (9), a tensioning wheel (10), a tensioning spring (8) and a transmission belt (11); the transmission belt (11) is connected between the large belt pulley (12) and the small belt pulley (7); the tensioning arm (9) is hinged to a machine body; the tensioning wheel (10) is rotationally arranged on the tensioning arm (9); the tensioning spring (8) is connected between the tensioning arm (9) and t