Mainboard easy to expand

The utility model discloses a mainboard easy to expand, which belongs to the mainboard field, and comprises a housing, the inner bottom wall of the housing is provided with four grooves, the inner bottom wall of each groove is fixedly connected with a mounting plate, the upper surface of each mounting plate is fixedly connected with a buffer spring, and the buffer spring is fixedly connected with the inner bottom wall of each groove. The upper surface of each damping plate is fixedly connected with a stand column, through mutual cooperation of the mounting plate, the buffer springs and the damping plates, the buffer springs can be compressed through the stand columns when the mainboard body is stressed and pressed downwards, the mainboard body is prevented from being damaged, and the practicability of the device is improved; the main board body can be fixed through mutual cooperation of the stand columns, the first threaded holes and the through holes, the effect of preliminarily fixing the main board body is