This study investigated bilingualism effects on the production of focus in 5- to 9-year-old Cantonese-English bilingual autistic children's L1 Cantonese, compared to their monolingual autistic peers as well as monolingual and bilingual typically developing children matched in nonverbal IQ, working memory, receptive vocabulary and maternal education. The results from an elicitation task showed that monolingual autistic children had significantly lower accuracy than typically developing children in producing focus in subject and object positions. Bilingual autistic children in general performed similarly to monolingual autistic children but outperformed their monolingual autistic peers in the production of object focus with a significantly higher accuracy. The total amount of English exposure did not relate to the accuracy of focus production in autistic and typically developing children. Our results also revealed autistic children's tendency to make use of less prosodic means to produce focus. The overall findings indicate that bilingual exposure has no detrimental effect on the language skills of autistic children but might enhance the production of focus in bilingual autistic children's L1 Cantonese.