The invention discloses a stable offshore operation lamp. The stable offshore operation lamp comprises a power supply device, a sliding movement part fixedly installed above the left side of the power supply device, and an operation lamp body; a sliding movement groove is formed in the bottom side face of the right side of the sliding movement part; a first screw rod which extends left and right is arranged in the sliding movement groove; the left side face of the first screw rod is connected with a first electric rotating machine; a square locking block used for being locked and connected with the operation lamp in cooperation is connected to the first screw rod in cooperation; the square locking block and the front-back interior of the sliding movement groove are connected in a sliding movement cooperation manner; a first conduction cavity which extends up and down is formed in the portion, on the right side of the sliding movement groove, of the power supply device; a second conduction cavity which extends to the right side is formed in the bottom of the first conduction cavity in a through penetrating manner; a hollow cavity is formed in the side, away from the first conduction cavity, of the power supply device; and a connection groove is formed in the side face of the side of the portion, above the left side of the hollow cavity, of the power supply device. The stable offshore operation lamp is simple in structure, convenient to operate and capable of automatically controlling the connection work.