The invention relates to the technical field of 3D printing, in particular to a 3D printing charging tray and an exposure stripping technology of the 3D printing charging tray. The 3D printing charging tray comprises a base, a releasing film, light-transmitting glass and a clamping plate. The base is provided with a first groove and a second groove, the first groove and the second groove penetratethrough the top end face of the base, the light-transmitting glass is arranged in the first groove, the upper surface of the light-transmitting glass is higher than the bottom wall face of the secondgroove, the release film is arranged on the top end face of the base and is pressed between the base and the clamping plate, a first cavity is defined by the release film, the inner wall of the firstgroove and the light-transmitting glass, a second cavity is defined by the release film and the inner wall of the second groove, and the two cavities communicate. During exposure, the cavities are pumped to from negative pressure, the release film can be tightly attached to the glass, bubbles do not exist between the release film and the glass, tensioning of the release film is achieved, the printing precision is improved, when the release film is released, air is inflated to the cavities, the cavities form positive pressure, the release film and the light-transmitting glass are stripped, andthe aim is easily achieved.