Abstract: As the concept of "green development" continues to be promoted, traditional tanning industry is increasingly affected by the pollution generated during its production process. The chromium tanning wastewater and sludge produced by the tanning process pose significant environmental and health hazards if not effectively treated and utilized. Additionally, improper handling leads to substantial waste of chromium resources. The development of economical and efficient chromium treatment and utilization technologies is urgent. This paper introduces various treatment methods for chromium-containing wastewater and sludge produced during the tanning process. These methods include recycling, electrocoagulation, bioleaching, and supercritical water oxidation. Furthermore, it provides a summary and outlook on the development of recycling methods for treating chromium in wastewater and sludge. The aim is to foster a new way of thinking about the development of China's leather industry towards greener practices.