GDP, called gross domestic product, is an important macroeconomic indicator, which represents the sum of products and services produced by a country and region in a period of time, that is, national wealth in a broad sense. GDP is a direct reflection of a country's national economic development. The GDP growth rate often mentioned in the news refers to the growth rate of the national economy at a specific time relative to another time. Comparing the two, we can directly see the operation of the national macro-economy. The commonly used comparison method is fixed base ratio, that is, based on the GDP at a certain time point, the GDP at each time point in the future is compared with this base point; There is also a ring comparison, which is based on the GDP at each time point and compared with the next time point. The method of comparison is different, in fact, in order to observe the operation of the national economy more objectively from different angles. It should be noted that GDP does not reflect the deeper situation of macroeconomic structure and model, so the higher GDP, the better. By developing industries with high pollution and high energy consumption, earning foreign exchange through sweatshops can also increase GDP, but this development model has been completely abandoned by the central decision-making level and has become a social science. The deepening understanding of GDP growth represents the progress and development of our country and nation.