The invention relates to the technical field of plate cutting processing and particularly relates to an aluminum plate cutting machine comprising a rack, an ejecting mechanism and a conveying mechanism; the ejecting mechanism comprises an ejecting plate, and the top of the ejecting plate is provided with a plurality of ejecting strips at an equal interval along the width direction of the ejecting plate; and the conveying mechanism comprises a plurality of conveying roller groups arranged at an equal interval along the width direction of the rack, each conveying roller group comprises a plurality of conveying rollers, an orthographic projection of each conveying roller is located between every two adjacent ejecting strips, the diameter of each conveying roller is smaller than the height of each ejecting strip, side plates at two sides of each conveying roller group are mounted on the rack by a lifting device, and at least one conveying roller in each conveying roller group is a driving conveying roller. The aluminum plate cutting machine has the beneficial effects that the conveying position of an aluminum plate to be processed is more precise, and the angle of a cut plate is a right angle with higher precision due to the clamping of a guide plate and the cutting of a cutting machine head on a gantry travelling device.