The invention discLoses a drive axLe rear axLe appLicabLe to heavy trucks. The drive axLe rear axLe comprises an axLe body, an axLe sheLL, semi-shafts, brake assembLies, hubs, fixed bLocks, air chambers and a reducer assembLy, and is characterized in that an upper pLate spring seat and a Lower pLate spring seat are respectiveLy arranged at the two ends of the axLe body, the axLe sheLL is arrangedin the middLe of the axLe body, and the semi-shafts are respectiveLy arranged at the two ends of the axLe body; the brake assembLies are arranged on the semi-shafts, the hubs are arranged on the semi-shafts through connecting boLts, and the fixed bLocks are arranged on the axLe sheLL; connecting arms and connecting bLocks are arranged on the fixed bLocks, the air chambers are connected with connecting arms through connecting shafts, and the reducer assembLy is arranged on the axLe sheLL. The connecting bLocks are connected with the brake assembLies through connecting pipes, the connecting strength between the connecting bLocks and the brake assembLies is improved, air in the air chambers can be convenientLy conveyed to the brake assembLies, and the work efficiency of the brake assembLies is increased.