A flexible-shaft speed-change operator comprises an upper dustproof cover (2), a gear selection arm (4), an operator support (5), a gear shift arm (7), a gear-selection fixed shaft (10), a torsional return spring (11), an operating rod (9), a step shaft (8), a gear-selection knuckle bearing (3) and a gear shift knuckle bearing (1), wherein the step shaft (8) is fixedly connected with the gear shift arm (7), an outer ring of the gear shift knuckle bearing (1) is fixed on the operator support (5), the inner ring of the gear shift knuckle bearing (1) sleeves the step shaft (8), the gear shift knuckle bearing (1) is axially provided with a shaft shoulder (12) of the step shaft (8) and a projection of the gear shift arm (7), the gear shift knuckle bearing (1) and the step shaft (8) are in clearance fit, the outer ring of the gear-selection knuckle bearing (3) is fixedly connected with the gear selection arm (4), the inner ring of the gear-selection knuckle bearing (3) sleeves the step shaft (8), and the gear-selection knuckle bearing (3) and the step shaft (8) are in clearance fit.