The Wnt/β-catenin signaling pathway plays a critical role in various biological processes, including cell proliferation, differentiation, and tissue homeostasis. Aberrant activation of this pathway is strongly associated with the development of various cancers, including colorectal, pancreatic, and gastric cancers, making it a promising therapeutic target. In recent years, inhibitors targeting different components of the Wnt/β-catenin pathway, including small molecules, peptides, and nucleic acid-based therapies, have been developed to suppress cancer cell growth. These inhibitors work by disrupting key interactions within the pathway, thereby preventing tumor progression. Antibody-based therapies have also emerged as potential strategies to block ligand-receptor interactions within this pathway. Despite these advancements, challenges such as the complexity of the pathway and toxicity concerns remain. Innovative approaches, including allosteric inhibitors, proteolysis-targeting chimeras (PROTACs), and peptide-based inhibitors, offer new opportunities to address these challenges. This review provides an overview of the latest progress in the development of Wnt/β-catenin pathway inhibitors and explores future directions in cancer therapy.