In this study,we examine the laws of thermodynamics and the weak cosmic censorship conjecture in the normal and extended phase spaces of Born-Infeld-anti-de Sitter black holes by considering a charged particle absorp-tion.In the normal phase space,the first and second laws of thermodynamics as well as the weak cosmic censorship are still valid.However,in the extended phase space,the second law of thermodynamics is violated for double-hori-zon black holes and part of single-horizon black holes.The first law of thermodynamics and the weak cosmic cen-sorship conjecture are still valid for all types of black holes.In addition,we found that the shift of the metric func-tion,which determines the locations of the horizons,takes the same form at the minimum point in both the normal and extended phase spaces,indicating that the weak cosmic censorship conjecture is independent of the thermody-namic phase space.