<p>To evaluate the expression of hsa_circ_0077007 in the serum of colorectal cancer (CRC) patients and offer a foundational theory for the prognosis of CRC. The present study focuses on investigating the biological function and therapeutic target of hsa_circ_0077007 in colorectal cancer CRC. Retrieve the GEO database and use the GEO2R tool to analyze the GSE dataset (GSE223001 and GSE159669) to obtain aberrantly expressed circRNAs. Serum hsa_circ_0077007 expression was measured by qRT-PCR in 107 CRC patients. Kaplan–Meier curve was used to analyze the repercussions of hsa_circ_0077007 expression on overall survival and prognosis. After the knockout of hsa_circ_0077007, the biological cellular functions of CRC were characterized. Finally, the downstream molecular expression mechanism of hsa_circ_0077007 was further explored. Hsa_circ_0077007 was among the abnormal circRNAs in GSE223001 and GSE159669. Compared to normal controls, CRC patients exhibited elevated levels of hsa_circ_0077007 expression in their serum. Additionally, the expression levels of hsa_circ_0077007 were significantly increased across four distinct CRC cellular lines, especially SW620 and LoVo cellular lines. Furthermore, high levels of hsa_circ_0077007 expression were associated with a reduced overall survival rate. In vitro, loss-of-function assays for hsa_circ_0077007 resulted in a marked reduction in cell proliferation, invasion, and migration, accompanied by a boost in cell apoptosis. Hsa_circ_0077007 can sponge miR-383-5p, and then inhibit the expression of miR-383-5p. High expression of hsa_circ_0077007 is indicative of shorter survival rates among CRC patients. The hsa_circ_0077007 has been demonstrated to enhance cellular proliferation, invasion, and migration, while concurrently inhibiting apoptosis.</p>