Deep vein thrombosis is a type of severe venous thromboembolism that can result in high mortality and morbidity. The expression alternation of circular RNAs (circRNAs) has been found in various diseases. However, the function of circRNAs in deep vein thrombosis still remains unknown. The blood samples of deep vein thrombosis patients and health control were selected, circRNA microarray was performed, and qPCR was used to verify the expression of circRNAs. Also, GO/KEGG analysis was performed, and hsa_circ_RNA_000455-targeted miRNA-mRNA network was predicted. Here, we found that 303 circRNAs were differentially expressed in deep vein thrombosis using microarray, of which 83 circRNAs were upregulated and 220 circRNAs were downregulated. The expression of five circRNAs verified by quantitative real-time PCR was consistent with the result of microarray. GO analysis showed that the top 100 differentially expressed circRNAs in deep vein thrombosis patients were closely related to protein transport, cytoplasm, and Adenosine Triphosphate (ATP) binding. The most significantly enriched pathways by KEGG analysis included thyroid hormone-signaling pathway, endocytosis, proteoglycans in cancer, Fc gamma R-mediated phagocytosis, focal adhesion, insulin-signaling pathway, p53-signaling pathway, biosynthesis of antibiotics, bacterial invasion of epithelial cells, and AMP-activated protein kinase-signaling pathway. Then, hsa_circ_000455 was selected, and the function of hsa_circ_000455 in the pathogenesis of deep vein thrombosis was analyzed via circRNA-miRNA-mRNA network. We therefore hypothesized that hsa_circRNA_000455/hsa-miR-22-3p/NLRP3 may involve in the development of deep vein thrombosis. This study provided valuable information on circRNA profile in deep vein thrombosis for the first time and gave clues on the possible role and mechanism of hsa_circRNA_000455 in deep vein thrombosis.