This paper aims to show the phonological influence of Chinese dialects in Spanish learning Spanish taking Shanghainese as an example. A comparison between the consonantal and vocalic inventory, as well as the intonation of the Shanghai dialect (Shanghainese) and Mandarin Chinese are made to find the phonological characteristics of the Shanghai dialect that contribute to the learning of Spanish. The research reveals that the Shanghai dialect facilitate the learning of the pronunciation of occlusive voiced consonants and the intonation in Spanish, however, like other Mandarin Chinese speakers, the Shanghainese speakers also find it difficult to pronounce the consonant groups and the alveolar trill. The large number of nasal consonants in Mandarin Chinese makes it hard to distinguish between the syllables that contain the nasal sounds and those without them. Finally, the collaborative work between native and non-native teachers is proposed to undertake a correct and effective phonetic teaching. Keywords: contrastive study, Spanish pronunciation, Chinese dialect, Shanghainese