A full-automatic erythrocyte sedimentation rate analyzer comprising: a base and a blending device and a detecting device mounted on the base, wherein the blending device comprises: a sample rack, a sample rack bracket arranged on the base and connected to the sample rack through a rotating shaft, a rotating device connected to the rotating shaft, wherein the rotating device drives the rotating shaft to rotationally drive the sample rack to turn over up and down, and a test tube rack arranged on the sample rack, wherein a plurality of holes are arranged in the test tube rack and a fixing device is arranged in each hole and used for placing and fixing a closed container containing a sample, wherein the detecting device comprises: a guide device, a driving device, an infrared transmitting and an infrared receiving device (410, 420) for each test tube rack and a mounting rack for mounting and fixing the infrared transmitting and receiving devices, wherein the driving device drives the mounting rack to move up and down along the guide device and the mounting rack drives the infrared transmitting and receiving devices to move, wherein the closed containers containing the samples are located on moving paths of the infrared transmitting and receiving devices and infrared rays penetrate through the closed containers to realize detecting, characterised in that the infrared transmitting and receiving devices (410, 420) comprise a transmitting plate mounted with a plurality of infrared transmitting tubes and a receiving plate with a plurality of infrared receiving tubes mounted thereon, wherein the infrared transmitting tubes and the infrared receiving tubes are corresponding one-to-one, wherein the transmitting plate and the receiving plate are spaced by a certain distance that allows the closed containers containing the samples to be accommodated in between both plates, the analyzer further being characterised in that the rotating device comprises an upper gear arranged on the rotating shaft and coaxial with the rotating shaft, a lower gear arranged on the base and a first driving band sleeved between the upper gear and the lower gear, wherein the lower gear is driven by a first motor arranged on the base. a base and a blending device and a detecting device mounted on the base, a sample rack, a sample rack bracket arranged on the base and connected to the sample rack through a rotating shaft, a rotating device connected to the rotating shaft, wherein the rotating device drives the rotating shaft to rotationally drive the sample rack to turn over up and down, and a test tube rack arranged on the sample rack, wherein a plurality of holes are arranged in the test tube rack and a fixing device is arranged in each hole and used for placing and fixing a closed container containing a sample, a guide device, a driving device, an infrared transmitting and an infrared receiving device (410, 420) for each test tube rack and a mounting rack for mounting and fixing the infrared transmitting and receiving devices, wherein the driving device drives the mounting rack to move up and down along the guide device and the mounting rack drives the infrared transmitting and receiving devices to move, wherein the closed containers containing the samples are located on moving paths of the infrared transmitting and receiving devices and infrared rays penetrate through the closed containers to realize detecting,