Code switching is an essential and inseparable part in language teaching, so teachers have tended to use code switching in teaching and learning English. The aims of this study were to find out the types of code switching and the factors that make English teacher switched the language when teaching English to young learners. The study was designed in the form of qualitative case study. The participant of this study was English teacher at SD IT Auladi Palembang. The data obtained from observations and interviews were analyzed using thematic analysis. The result of the study indicated that types of code switching used by the teacher when teaching English to young learners were tag switching, inter-sentential switching and intra-sentential switching. Meanwhile, the practices of doing code switching were affected by lack of students’ English competency, lack of teacher’s English competency, ease of giving instruction and communication, ease of maintaining students’ discipline in the classroom and ease of expressing teacher’s feeling. Keywords: EFL, English language teaching, Code switching, Young learners.