During the period of heavy haze in North China (September 30, 2013), we analyzed aerosol particle distribution and the vertical distribution characteristics of aerosol and cloud condensing nuclei (CCN) by using observational datasets from the aircraft of Cheyenne ⅢA. The results show that the aerosol number concentration in both areas decreases with the increase of height, the effective radius of aerosol particles in both cities is close to each other, the range of aerosol effective radius in the accumulation mode and the coarse mode are 0.05-0.35μm and 0.8-2.2μm, respectively. Two inversion layers appear in and above the boundary layer, with a significant increase in the aerosol concentration below the inversion layers. The analysis of aerosol back trajectories indicates that the aerosol at the height of 3000m is mainly controlled by long transportation of the air mass, the aerosol at 1500m is mainly from the south side of the ground pollutant with a short transport distance, the aerosol at the height of 500m is affected by the southern air mass with a high concentration of aerosol fine particles. The profiles of CCN shows that the number concentration of CCN decreases as the height increases, and the presence of inversion layer has a cumulative effect on CCN. Then the relationship between aerosol and CCN in both cities has been studied, the result shows that correlation coefficient of aerosol-CCN in both areas is above 0.95, while the correlation coefficient in clouds is just 0.83, and the number concentration of CCN in clouds is lower than outside, which indicates that the consumption of CCN in the activation of cloud droplets. The width of aerosol particles spectrum is narrow below cloud base, and is large in clouds or above cloud top height.