Portable signal lamp for ship

The invention relates to the technical field of signal lamps, and particularly discloses a marine portable signal lamp which comprises a portable signal lamp body and a supporting device, the portable signal lamp body comprises a lamp body and a rotating shaft connected with the lamp body, the supporting device comprises a stand column and a locking piece, and the stand column is used for being fixed to a deck of a ship; an insertion hole extending in the vertical direction is formed in the top end of the stand column, the hand-held signal lamp has a use state and a non-use state, when the hand-held signal lamp is in the use state, the rotating shaft is inserted into the insertion hole and can rotate relative to the stand column, and when the hand-held signal lamp is in the non-use state, the rotating shaft is separated from the stand column; when the hand-held signal lamp is in a use state, the locking piece is used for locking the relative positions of the stand column and the rotating shaft, when the hand-