The utility model discloses an automatic unloading control system of a hopper car. The automatic unloading control system comprises a main control device, a door closing device and at least two groups of door opening devices, wherein the main control device is connected with the door closing device and the door opening devices respectively; the door opening devices and the door closing device are arranged on the sides of a hopper car operation rail along the forward movement direction of the hopper car. The door opening devices and the door closing device can obtain vehicle information and send the vehicle information to the main control device; after the main control device receives the vehicle information, a door opening driving instruction is correspondingly sent to the door opening devices to open a bottom door of the hopper car, or a door closing driving instruction is sent to the door closing device to close the bottom door of the hopper car. The plurality of door opening devices are arranged, the automatic unloading is realized by opening and closing control of the bottom door of the hopper car and the car does not need to be stopped to unload, so that the unloading speed is accelerated, and furthermore, the unloading efficiency is improved.