Vocabulary learning is one of the most essential and fundamental elements in the study of English. However, there are always many kinds of problems in most students with learning difficulties. And it has caused many problems in English teaching. The present paper investigates the main problems in English vocabulary acquisition, such as the imprecise pronunciation, the ineffective way of learning vocabulary, the lack of self-confidence and so on. It also analyses the reasons involved. Then, it gives some corresponding and effective solutions.