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This utility model discloses a respirator for infectious disease nursing, belonging to the technical field of infectious disease nursing equipment. It includes a compression airbag and an air inlet tube located at the top of the compression airbag for air intake. An air delivery tube for air exhaust is located at the bottom of the compression airbag, and the bottom end of the air delivery tube is connected to a mounting plate via an adjusting valve. A connecting plate is installed at the top of the air delivery tube, and limiting blocks are slidably installed at both ends of the connecting plate. This respirator for infectious disease nursing, with its limiting blocks, allows for precise positioning of the air delivery tube and compression airbag. Simply insert the connecting plate at the top of the air delivery tube into the bottom inner side of the compression airbag. The two inclined arc-shaped limiting blocks then retract, and subsequently, two compression springs automatically eject the limiting blocks into the compression airbag, thus achieving precise positioning and fixation of the connected air delivery tube, resulting in better stability.