This article explores the difficulties and challenges of learning English in a multilingual environment, as well as possible solutions. Multilingual environment refers to the situation in which one is exposed to two or more languages at the same time, which has both advantages and disadvantages for English learners. This paper analyzes the influence of multilingual environment on English learning from four aspects: language input, language output, language cognition and language emotion, and points out the existing problems and perplexities, such as language interference, language confusion, language conversion and language anxiety. This paper also puts forward some coping strategies, such as choosing suitable learning materials, adopting diversified learning methods, looking for practical opportunities, cultivating language awareness and language confidence, etc. The purpose of this paper is to provide some useful suggestions and references for people learning English in a multilingual environment.