Photodynamic therapy(PDT)has been increasingly applied in clinical cancer treatments.However,native hypoxic tumor microenvironment and lacking of oxygen supply are major barriers to potent photodynamic reactions.Here,we report smart nano artificial red cells loading photosensitizer and hemoglobin with synchronous oxygen supply for boosted photodynamic strategy.Protected by the lipid-polymer core-shell nanostructure,the interactive photosensitizer and hemoglobin show excellent acidic/thermal stability.Upon exposure to near-infrared laser,the remote-detonated photosensitizer generates massive cytotoxic reactive oxygen species(ROS)with sufficient oxygen supply.Simultaneously,hemoglobin is oxidized into the more active ferryl-hemoglobin,which has a 35-fold half-autoreduction time than ROS,leading to rather prolonged cytotoxicity.ROS and ferryl-hemoglobin synergistically trigger the oxidative damage of tumor resulting in complete suppression.Moreover,the photosensitizer-loaded nano artificial red cells spontaneously act as an ideal fluorescent/photoacoustic(FL/PA)dual-modality imaging probe,dynamically monitoring the photosensitizer/oxygen metabolism and consumption,which could be served as a versatile theranostic platform.