The American visa was successful, but I didn't go. Will it affect my future visa?

The success of the American visa but not going will not affect the future visa.

The visa is only a pass to the United States, but if you don't enter the country within the validity period, there will be no problem; If you don't go to the United States within the validity period, subsequent visas will not be affected after the visa expires.

: 1, US visa

An American visa is an endorsement on a passport or other travel document held by an American or foreign citizen, indicating that the holder is allowed to apply for entry into the United States. It can also be said that it is an endorsement certificate issued to them.

2. Classification of American visas:

There are two categories of immigrant visas and non-immigrant visas, and each category can be subdivided into many subcategories.

It should be noted that the US Customs and Border Protection (CBP) will finally decide to grant the right of entry at the port even if it is impossible to successfully enter the United States with a US visa.

Reference link: Baidu Encyclopedia _ American Visa