Previous studies of many Indo-European languages have suggested that the lexical stress (or word stress) is closely related to the position of syllables. However, whether there is lexical stress in Chinese is still a question. Therefore, this article mainly studies two issues: (1) Does Chinese have lexical stress? (2) What factors determine the stress of Chinese words? To address the above issues, this study developed 2 criteria for judging lexical stress, namely: (1) different stress levels should have significant acoustic differences. (2) they can distinguish the meanings of vocabulary. On this basis, we studied the correspondence between linguistic features and stress levels. The result suggests that Chinese lexical stress is not determined by position, but by the type of syllable tones, atonal (neutral tone) syllables are light, while tonal (tone1, tone2, tone3, tone4) syllables are heavy. Therefore, whether there is tone or not is the phonological standard for distinguishing between light and heavy. For tonal syllables, although there may be slight differences in the perception of their lightness and heaviness, these differences are only phonetic differences and are not a phonological standard for determining lexical stress.