This work aims to study the perception of consonant occlusive sounds of the EP by Chinese learners with different levels of proficiency in the Portuguese language. Based on work such as Flege (1995) and Best (1995), we discussed the following research questions: (1) Which minimum pairs of occlusive consonant sounds cause most difficulty for Chinese PLE learners? (2) What factors influence the perception of occlusive consonant sounds? (3) What is the situation regarding the perception of occlusive consonants by Chinese learners with different levels of proficiency (B1 and C1)? The results indicate that the minimum pair [k]/[g] is the occlusive consonant sounds which cause most difficulty for Chinese PLE learners; the LM is a factor which influences the perception of occlusive consonant sounds; the time of learning the foreign language and staying in a foreign language country are not the factors which can definitely influence the perception of occlusive consonant sounds