To examine the influence of laser power on the stability of laser-MIG hybrid aluminum alloy welding process, a high-speed camera and NI USB-6251 data acquisition card were used to study the arc parameters, droplet transfer behavior, and spatter generation behavior in the hybrid welding process. The results indicated that as the laser power increased, the peak current of the arc decreased, whereas the peak voltage increased. Under the laser power of 4 kW, the projected droplet transfer was dominant, and short-circuit transition occurred occasionally. When the laser power increased slightly, the short-circuit transition phenomenon disappeared. However, when the laser power increased to 5.5 kW, there was a transition form of one droplet every two pulses in the stable transition of one drop per pulse, reducing the stability of the droplet transition. As the laser power increased, the metal vapor shearing force on the liquid metal on the keyhole wall increased, resulting in an increased number of spatters above the keyhole wall. When the laser power was 4‒4.5 kW, the number of spatters on the rear keyhole wall was significantly higher than that on the front keyhole wall. However, when the laser power was more than 5 kW, the number of spatters on the front and back keyhole walls was almost equivalent. In addition, the force of the molten pool metal on the keyhole walls was analyzed, and the mechanism of spatters above the keyhole wall was summarized.