Camellia oleifera Abe. is an important woody oil tree in China, which has important economic and social benefits. Cryptochrome is one of the blue light receptors in plants, which is involved in the growth and development of plants such as flowering regulation and photomorphogenesis. In this study, CoCRY1 gene was cloned from C.oleifera ""Huashuo"". Bioinformatics analysis showed that CDS sequence length of CoCRY1 was 2262 bp, and it encoded protein included 684 amino acids. Homologous sequence and phylogenetic tree analysis showed that CoCRY1 protein had the highest similarity with the sequence of tea tree (Camellia sinensis). Tissue expression analysis showed that the expression of CoCRY1 was the highest in stem and the lowest in flower. Arabidopsis thaliana plants with heterogenous expression of CoCRY1 gene were obtained by Agrobacterium transformation, and transgenic plants were identified from DNA and RNA level. Phenotypic analysis of transgenic Arabidopsis showed that overexpression of CoCRY1 gene led to early flowering under long day condition and specifically inhibited the elongation of hypocotyl under light. Through bioinformatics, quantitative analysis and heterologous expression, it was found that CoCRY1 gene plays an important role in the biological process of C.oleifera flowering.