The invention discloses a portable mulberry harvesting device which is provided with a first air bag, a second air bag and a third air bag. The portable mulberry harvesting device is formed by piling up the three layers of independent annular air bags, and the annular air bags, a thickened anti-cracking flat bottom and a circular truncated cone are communicated through a zipper arranged at the top end of the circular truncated cone. When the portable mulberry harvesting device is used, assembly and disassembly are achieved through the zipper, therefore, it is effectively guaranteed that air leakage of the device is prevented, and meanwhile the external height is adjusted by adjusting the inflation number of the annular air bags; standard air leakage preventing air nozzles are adopted, and therefore an air leakage preventing effect can be achieved under the self air pressure action after the air bags are inflated; the circular truncated cone is made of flexible cloth, the bottom of the circular truncated cone is connected with the thickened anti-cracking flat bottom, and through the flexible material, the circular truncated cone can be conveniently folded when the circular truncated cone is not used and unfolded when the circular truncated cone is used and is convenient to carry; an annular circular pipe can be used by cooperating with binding bands for binding, therefore, the vertical height can be adjusted according to the length of the bottom of a trunk, and the size of the annular circular pipe can be adjusted according to the diameter of the trunk; the zipper penetrates through the annular air bags, the thickened anti-cracking flat bottom and the circular truncated cone, therefore, use is convenient and fast, and the zipper is beneficial for fruit pouring after fruit harvesting.