The utility model relates to an air gun source suspension connecting plate, which is applied to geophysical prospecting for offshore oil. The air gun source suspension connecting plate is characterized in that an air gun is connected to the lower part of the suspension connecting plate through two vertical iron chains; the air gun is connected with a buttcock line cable and a high-pressure air tube; the other ends of the buttcock line cable and the high-pressure air tube are fixed on the suspension connecting plate through a fixed pressure block; a near-field submarine seal and a depth and pressure sensor are fixed on one side of the suspension connecting plate by a U-shaped fastener, and a clamping ring is arranged on the other side of the suspension connecting plate; and both ends on the upper part of the suspension connecting plate are provided with transversely connected iron chains. The air gun source suspension connecting plate has the advantages of being capable of hanging and connecting an air gun cluster of a rear dragging air gun source and reliably implementing excitation of the air gun, and realizing vertical suspension connection of the air gun cluster or a single air gun under water and fixation of the air gun cluster or the single air gun with an auxiliary quality monitoring component and a cable air tube bank. Moreover, a joint part does not bear impact and vibration of the air gun, and is difficult to damage and convenient to replace.