<p>Hydrodynamic disturbance and light quality are important factors affecting the growth and reproduction of <i>Microcystis</i>. The effect of hydrodynamic disturbance on <i>Microcystis</i> is related to disturbance mode, disturbance time and intensity. <i>Microcystis</i> responds to different light quality and the combined effect of hydrodynamic disturbances and light quality on <i>Microcystis</i> blooms is not well known. This study reports on the combined effect of hydrodynamic disturbance and green light on <i>Microcystis</i> blooms in field conditions. In treatment groups, pumps were used to produce hydrodynamic disturbance and green transparent films at the tops of treatment pools to obtain green light. In the control groups, there were no pumps nor green transparent films. The results showed that the average number of <i>Microcystis</i> in the control (52.01 × 10⁷ cells L⁻¹) was significantly higher than that in treatment groups (11.12 × 10⁷ cells L⁻¹) (<i>P</i> &lt; 0.01). At the end of this experiment, the abundance proportion of <i>Microcystis</i> in control groups to total algae abundance was 99.14%, but it was 1.93% in treatment groups. The dominant species of phytoplankton shifted from <i>Microcystis</i> (Cyanophyta) to <i>Cosmarium</i> (Chlorophyta) and <i>Navicula</i> (Bacillariophyta) in treatment groups, but it was <i>Microcystis</i> in the control groups. The results showed that the combination of hydrodynamic disturbance and green light successfully weakened the <i>Microcystis</i> blooms and provided a fast and effective method of control <i>Microcystis</i> blooms.</p>