With the rapid growth of big cities, more and more people choose to live in a big city. Nowadays, it is commonly believed that living in a big city will provides them with many opportunities, but I wonder that people who live in a big city are facing more challenges.There are numerous challenges of living in a big city, and I would explore only three challenges here. The first challenge is that the house prices are so high that only a small proportion of people can afford. In order to live in the big cities, it is necessary for others to rent the house with a high price. The second one is that the companies in big cities ask their employees to create value all the time, which results in high living pressure for staffs. The last one is that people who living there don’t have intimate friends to share their feelings.Based on the points discussed above, we may reasonably draw the conclusion that people living in a big city are in front of many challenges. Dealing with the challenges is not different from conquering a great mountain; both of us require determination, courage, and perseverance.