This study examines the effects of different legislative models regarding sex purchase through a comparative analysis of Sweden, the Netherlands, Germany, and Canada. Using quantitative methods, the study analyzes how different legislative models affect human trafficking for sexual purposes. The findings show that while no model has completely eliminated these issues, the Swedish model characterized by its criminalization of purchase while decriminalizing sale has been most successful in changing societal attitudes and reducing demand for sexual services. Legalization models in the Netherlands and Germany, where selling and buying sex is legal prove despite extensive regulations have encountered significant challenges with control and implementation. The study particularly notes the impact of digital development on sex trade as a growing challenge for all countries. The study also highlights the critical importance of implementing comprehensive strategies that combine robust legal frameworks with extensive social support systems and intervention programs.The research concludes by emphasizing the necessity for evolving approaches to combat human trafficking in an increasingly digital world, suggesting that successful policies must be flexible enough to respond to changing circumstances.