Obtained a lot of gold and silver through the enslavement of Indians and blacks. Spain adopted a policy of killing chickens and retrieving eggs for the American colonies. To some extent, this policy was determined by the domestic objective environment. On the one hand, America has a large amount of silver, and on the other hand, there is a lack of industry in the country, which has not reached the level of exporting industrial products. At the same time, the influx of gold and silver in the Americas caused a large-scale increase in prices, which had a negative effect on the development of industry. The backwardness of Spain's domestic industry and shipping industry has caused the British and Dutch economic forces to infiltrate the colonies. It can be said that Spain has suffered from its own evil results. The reason is that a large amount of gold and silver has eliminated the need for the reform of production relations, leading to a decline in Spain's productivity and finally failure.