In order to determine the risk control countermeasures after the ice accumulation under the cruise configuration of a turboprop aircraft, starting from the characteristics of the wing flow field, the relevant risks were analyzed and specific countermeasures were proposed. The results show that due to the influence of propeller slip flow and airfoil, the asymmetry of the separation of ice accumulation and air flow on both wings of the aircraft is an important feature that cannot be ignored, leading to a decrease in lift on the right wing and a decrease in the efficiency of the right aileron. The aircraft continues to roll right and pitch down, resulting in a sharp decrease in altitude. However, the relevant information does not consider this feature, and the description of the phenomenon and disposal after ice accumulation is not complete enough, which can easily lead to the pilots making mistakes and posing a high risk. Countermeasures include: attaching great importance to risk management when flying in iced areas. When flying in the ice zone, the speed must be selected according to the flight altitude and weight, the relevant principles should be followed, adjustment plates must be used correctly, and appropriate maneuvers should be made if necessary. Once the aircraft rolls abnormally to the right and the steering lever is unexpectedly deflected to the right, firstly the angle of attack should be reduced, then the slope be changed, and then the lever out of the dive be pulled. Strictly avoid instinctively pressing the rod at a high angle of attack, pulling the rod with a slope and other incorrect actions and avoid large side slip angles and flat tail negative angles of attack. The relevant expressions in the technical data should be improved through further research and demonstration.