The MAZ-538 (Russian: МАЗ-538) is a heavy four-wheeled bulldozer which was designed and built in the Minskyi Avtomobilnyi Zavod from the 1955 to 1990 model years, used for the Soviet armed forces.

In contrast to the prototypes and the first models, this partly also happened outside the MAZ plant at then still secret (or even officially nonexistent) armament companies like MZKT or KZKT.

The KT stands for wheeled tractors (Russian: колесный тягач), the first letter for the specific application depending on attachments.

Later, it was decided to install additional equipment on the rear of the vehicle, such as pulling devices, rippers to loosen the ground, or large trenching machines.

Power for both the machine and ancillary equipment comes from a V12 D12A-375 diesel engine, originally designed for tanks in World War II.