Colorectal carcinoma (CRC) poses a serious risk to global human health. Long non-coding RNAs (LncRNAs) play an important role in the pathogenesis of CRC. There is a scarcity of data about a newly identified lncRNA, FAM30A. Our major objective is to investigate the role of FAM30A in the process of CRC. Gene expression data and correlated clinical information were retrieved and downloaded from public databases to identify differentially expressed genes linked to CRC. The expression of FAM30A was identified in clinical samples and CRC cell lines using via Quantitative Real-time Polymerase Chain Reaction (qPCR) assay also. The survival significance of FAM30A was determined via R package "survival." Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis was performed to identify FAM30A-related signalling pathway. The levels of proteins expression were determined by western blot assay. The effect of FAM30A on CRC cell biological behaviours was evaluated by cell function experiments. FAM30A was identified down-regulated in CRC based on the data from public database. FAM30A had lower expression in CRC clinical samples and cell lines. Low FAM30A expression was positively related to a poor prognosis in CRC patients. After FAM30A was overexpressed, the proliferation, invasion, and migration abilities of CRC cells were decreased, and the rate of CRC cell apoptosis increased. Furthermore, overexpression of FAM30A could block JAK-STAT signalling. FAM30A suppresses proliferative, invasive, and migratory abilities of CRC through blocking JAK-STAT signalling. Thus, it can be a novel biomarker of CRC prognosis.