Abstract： This article is to introduce Professor MA Dazheng's experience in treating cough during pregnancy by classical formulas. Professor MA believes that the external contraction leading to cough during pregnancy can be wind- cold， wind- heat and dryness. The internal damage resulting in cough during pregnancy include liver qi depression and stagnation and impaired lung purification and down- sending， excessive internal heat of hepatitis and wood fire tormenting metal， intestine- bowels heat accumulation along the meridians disturbing the lung， kidney water loss failing to engender metal and water， and phlegm- heat obstructing the lung causing cough complicated with panting. In clinical practice，Professor MA first differentiates the exterior and the interior and then determines the locations of disease. He believes that the diseases induced by external contraction by using medicines for releasing the exterior and dissipating cold and those for restraining pathogenic factors should be avoided； the phlegm and differentiates the color and nature should be recognized in a flexible way，and the disease treated based on cold rheum and phlegm-heat；with focus on the method of regulating qi and soothing the liver，the Frigid Extremities-related formulas should be selected for releasing binding constraint；the pathogenesis should be observed carefully according to objective conditions and following the norms and the panting and cough is usually caused by yin deficiency and excessive fire because of exuberant qi.