The antonym dictionary is a very useful learning tool for primary school students. There are many excellent antonym dictionaries available to students in China.

1. Xinhua Dictionary is a very classic Chinese dictionary, which contains many antonyms and synonyms and is suitable for primary school students.

Modern Chinese Dictionary is also a good choice, which explains the meaning of each word in detail, including its antonym.

In addition, there are some antonym dictionaries specially designed for primary school students, such as the antonym dictionary for primary school students. These dictionaries are usually concise and easy for primary school students to understand.

4. In addition, some online education platforms also provide antonym learning resources, such as "homework help" and "Little Ape Search". These platforms are rich in antonym learning materials and exercises, which can help primary school students consolidate antonym learning.

These are all good learning tools, and I hope they will help you.