how do i get from kunming airport to wall of china cheap and easy

Do you refer to China Great Wall? If so, it has many sections in north China. Which section do you prefer? Anyway, Badaling section near Beijing is the most popular one. You can fly to Beijing first and then catch a taxi to the wall for a visit. Or go to Beijing North Railway Station to catch a train or Jishuitan (Deshengmen) to take Express Bus line 919 to get there.