The invention discloses an MCU (microprogrammed control unit)-based intelligent braking control device for engineering machinery. The MCU-based intelligent braking control device comprises a vehicle alarm device and a vehicle distance detector. The vehicle distance detector is used for measuring the distances from the engineering machinery to operation projects and comprises an MCU, a power module, a data information processing module, a memory storage module, a vehicle speed monitoring module, a radar detecting instrument, a distance sampling module and a display screen, the vehicle alarm device comprises an alarm module, a wireless data transmission module, a brake apparatus and a monitor, and the power module, the data information processing module, the memory storage module, the vehicle speed monitoring module, the radar detecting instrument, the distance sampling module and the vehicle alarm device are bidirectionally connected with the MCU. The MCU-based intelligent braking control device has the advantages that the MCU-based intelligent braking control device is simple in structure and convenient to mount; various devices are connected with one another, accordingly, vehiclescan be effectively controlled under the effects of instructions of the MCU, the safety and the stability are obviously enhanced as compared with conventional intelligent braking systems, and the driving and riding safety and stability can be effectively improved.