The application discloses a low-temperature freezing rotary
cutting device, which is characterized by sequentially sleeving an outer sleeve, an inner sleeve and an inner tube from outside to inside, setting a puncture tip at the head end of the outer sleeve, fixing the
tail ends of the outer sleeve and the inner sleeve on a fixing piece, forming an intermediate cavity for the air inlet structure to enter between the outer sleeve and the inner sleeve, setting a sampling groove near the head end of the outer sleeve and the inner sleeve, setting a sealing structure at the intermediate cavity corresponding to the sampling groove position, forming a plurality of release cavities and air inlet chambers communicated with the release cavities, setting the air inlet structure to provide
refrigerant to the corresponding release cavities through the air inlet chambers, and setting corresponding freezing holes of the inner sleeve at the release cavities. After the
tumor tissue is sucked into the sampling groove under the negative pressure, the
refrigerant freezes the
tumor tissue through the freezing holes to make the
tumor tissue lose the original biological elasticity, and then the tissue is rotary
cut through the inner
cutting blade on the inner tube, so that the tumor tissue can be effectively removed, and the sampling efficiency is improved.