An array-spraying additive manufacturing apparatus for a large-sized equiaxed crystal aluminum alloy ingot, comprising: a liquid aluminum spraying mechanism having array nozzles and disposed in an atmospheric pressure chamber, and a movable condensing mechanism and a control mechanism which are disposed in the atmospheric pressure chamber and below the liquid aluminum spraying mechanism, wherein the control mechanism is configured to send an upward guiding command to a release mechanism and issue a three-dimensional movement command to the movable condensing mechanism respectively, such that liquid aluminum in the liquid aluminum spraying mechanism is sprayed to a surface of the movable condensing mechanism in a form of a continuous array of liquid flows according to a preset path, and is rapidly condensed to form the ingot; and the liquid aluminum spraying mechanism comprises: the release mechanism, a liquid aluminum chamber, and array nozzles, wherein the array nozzles are disposed at a bottom of the liquid aluminum chamber, and the release mechanism is connected with the control mechanism to control starting and ending of the liquid aluminum spraying process; a nozzle row spacing and a nozzle column spacing of the array nozzles are less than 300mm, and a nozzle aperture is 0.2mm-30mm; and a single-pass movement length of a single nozzle is equal to the nozzle column spacing, and a total width of movement of the single nozzle is equal to the nozzle row spacing; the movable condensing mechanism comprises: a condensing table disposed right facing the array nozzles, a two-dimensional movable mechanism which is vertically movable and disposed under the condensing table, and a downward guiding device, wherein the two-dimensional movable mechanism and the downward guiding device are respectively connected to the control mechanism, and configured to receive two-dimensional movement command and vertical movement command so as to realize three-dimensional movement; and the release mechanism comprises an upward guiding device and a plug pole, wherein the plug pole is matched with the array nozzles, and the upward guiding device is respectively connected with the plug pole and the control mechanism in order to receive a release command and control the plug pole to lift upward to release the array nozzles. the liquid aluminum spraying mechanism comprises: the release mechanism, a liquid aluminum chamber, and array nozzles, wherein the array nozzles are disposed at a bottom of the liquid aluminum chamber, and the release mechanism is connected with the control mechanism to control starting and ending of the liquid aluminum spraying process; a nozzle row spacing and a nozzle column spacing of the array nozzles are less than 300mm, and a nozzle aperture is 0.2mm-30mm; and a single-pass movement length of a single nozzle is equal to the nozzle column spacing, and a total width of movement of the single nozzle is equal to the nozzle row spacing; the movable condensing mechanism comprises: a condensing table disposed right facing the array nozzles, a two-dimensional movable mechanism which is vertically movable and disposed under the condensing table, and a downward guiding device, wherein the two-dimensional movable mechanism and the downward guiding device are respectively connected to the control mechanism, and configured to receive two-dimensional movement command and vertical movement command so as to realize three-dimensional movement; and the release mechanism comprises an upward guiding device and a plug pole, wherein the plug pole is matched with the array nozzles, and the upward guiding device is respectively connected with the plug pole and the control mechanism in order to receive a release command and control the plug pole to lift upward to release the array nozzles.