You can do it as follows:

Use the official website of AliExpress: You can visit the official website of AliExpress (www.aliexpress.com) and enter relevant keywords in the search bar, such as the product or category you are interested in. The search results will show a list of sellers, and you can filter out the top sellers based on indicators such as reviews, sales, and stores.

Use AliExpress rankings: AliExpress provides some rankings that show the most popular and popular sellers and products. You can find these rankings on the official website of AliExpress and find the top sellers by looking at the seller information on the list.

Use third-party tools and websites: There are some third-party tools and websites that provide ranking and review information of AliExpress sellers. You can use these tools and websites to find the top sellers on AliExpress. For example, you can use tools such as "AliShark", "AliExtractor", etc. to search and analyze the popular sellers on AliExpress.

Please note that the top sellers on AliExpress may change according to different product categories, regions, and time. Therefore, you can choose the appropriate method to find the TOP sellers according to the products or categories you are interested in. In addition, finding the TOP sellers does not only rely on sales and reviews, but also needs to consider other factors, such as the store's reputation, service quality, after-sales support, etc.