The utility model provides a rotary nut crushing device which comprises a rack, a cutter body, a screw rod, a steel ball, a driving device, a driving handle and an auxiliary handle, the rack comprisesa crushing head of a C-shaped structure and a crushing machine body of a hollow structure, and the crushing machine body is integrally arranged on the crushing head; a nut cavity is formed in the crushing head; a guide groove is formed in the rear end of the crushing head; wherein a cutter body cavity and a guide cavity are sequentially formed in the crushing machine body; wherein the cutter bodycomprises a cutter head and a cutter bar; the cutter bar is arranged at the rear end of the cutter head and connected with the cutter head through a key; the tool bit is arranged in the guide groove;the cutter bar is in transmission connection with the screw rod through a steel ball; the screw rod is connected with the driving device through a spline; a driving handle is arranged at the rear endof the driving device; and an auxiliary handle is fixedly mounted above the crushing machine body. The device is simple in structure, light in weight, convenient to use, convenient to carry, time-saving, labor-saving and convenient to operate, and can meet the crushing requirements of different types of nuts.