The utility model relates to an aircrash-prevention double-box inwards slanting slide plate-type airplane fuel tank which can efficiently solve the problem that the fuel tank explodes and burns after an aircrash. The airplane fuel tank provided by the utility model adopts the structure that an oil inlet communicated with an inner box body is formed at the upper part of an outer box body; a chute board with an inclined plane, of which the front part is low and the rear part is high, is mounted in the lower part of the outer box body; an oil outlet communicated with the inner box body and the outer box body is formed at the lower part of the chute board; an oil delivery pipe extending out of the outer box body is mounted on the oil outlet; a lower sliding-prevention tenon poking device is mounted at the front part of the chute board; an upper sliding-prevention tenon poking device is mounted at the rear part of the chute board; a movable box board is mounted at the front part of the outer box body; a box board tenon poking device is mounted on the movable box board; the movable box board is connected with the outer box body into a whole through a rotating shaft; and a tenon poking device locking groove is formed on the inner box body. The airplane fuel tank has the advantages of novel and unique structure and convenience in use, can be used on an airplane to effectively prevent the airplane from oil tank explosion and burning during the aircrash, and can reduce casualties and property loss caused by aircrash.