Insect pest resistance is a critical aspect of modern agriculture, as pest infestations can lead to significant crop losses and impact food security. This chapter reviews the key approaches developed to enhance insect pest resistance in crops, focusing on both traditional and advanced methods. Conventional breeding techniques, such as selective breeding and hybridization, have long been used to develop pest-resistant varieties. However, these methods are time-consuming and limited by the genetic diversity available within a species. In recent years, biotechnological advancements have enabled more precise and efficient approaches. Genetic modification (GM) has introduced traits such as insect resistance in crops like Bt cotton and Bt corn, which produce proteins toxic to specific pests. Gene editing tools, such as CRISPR/Cas9, offer further refinement by allowing targeted modifications to plant genomes, enhancing pest resistance without introducing foreign DNA. RNA interference (RNAi) is another promising approach, where gene silencing is used to disrupt vital processes in pest species, thereby reducing their impact on crops. In addition to genetic approaches, integrated pest management (IPM) strategies combine biological control methods with pest-resistant varieties to reduce reliance on chemical pesticides, promoting environmentally sustainable agriculture. The chapter discusses the progress and challenges of these approaches, highlighting the need for ongoing research to address pest resistance evolution and optimize these technologies for global food production.