The invention relates to a hoop type door shaft. The hoop type door shaft is composed of an upper door shaft and a lower door shaft, wherein each of the upper door shaft and the lower door shaft is composed of a left hoop and a right hoop; the left hoops and the right hoops are movably connected; an upper shaft is arranged at the upper part of the right hoop of the upper door shaft and a rotary shaft hole is formed in the lower part of the upper shaft; a lower shaft is arranged at the lower part of the left hoop of the lower door shaft and a rotary shaft is arranged at the top of the lower shaft; the rotary shaft is inserted into the rotary shaft hole so that the upper door shaft and the lower door shaft are connected. Bayonets and fixed plates are arranged at two side ends of the left hoops respectively and clamping heads and fixed plates are arranged at two side ends of the right hoops respectively; the fixed plates are provided with fixed holes. According to the hoop type door shaft disclosed by the invention, the hoops are used for fixing the door shaft on a door column to replace a conventional door shaft, so that the previous condition that two points of one door are stressed is changed into the existing condition that the two hoops are stressed; the stressing strength is greatly reduced so that the service life is prolonged. The problem that the door shaft of a previous stainless steel pipe door is cracked is solved. The hoop type door shaft is simple to use, is safe and reliable and prolongs the service life.