The utility model discloses an electric control brake assembly of an unmanned vehicle. The electric control brake assembly comprises an electric control brake system and a remote controller which arearranged on the left side and the right side of a vehicle chassis side by side and control wheels on the side to brake respectively. Each electric control brake system comprises a control unit, an information monitoring unit and a brake unit; wherein the control unit comprises an electric push rod with a self-locking function, a microcontroller for controlling the electric push rod to act and a rotatable brake sleeve, the information monitoring unit comprises a pressure sensor, one end of the pressure sensor is fixed on a vehicle chassis, and the other end of the pressure sensor is hinged withthe electric push rod; the microcontroller is electrically connected with the electric push rod and the pressure sensor; brake sleeves in the two electric control brake systems are rotationally fixedat the two ends of a brake shaft; the remote controller is connected with the microcontrollers in the two electric control brake systems in a wireless mode. Braking of a set of wheels arranged in parallel in the vehicle can be accurately controlled through electric control, the structure is simple, and performance is safe and reliable.