The invention discloses a novel hydraulic elevator with an opening-closing signal indication function. The novel hydraulic elevator comprises a left door body, a right door body, a hydraulic cylinderI and a hydraulic cylinder II; one end of the hydraulic cylinder I is connected with the right door body through a right connection rod and a first pull rod, and the other end of the hydraulic cylinder I is connected with the left door body through a left connection rod and a second pull rod; a plunger latch is connected between the left door body and the right door body and provided with a locking mechanism; and the end of a piston rod II of the hydraulic cylinder II is connected with the plunger latch through a pull head, a third pull rod and a fourth pull rod in sequence. The whole device is provided with three signal output parts, when a door body is opened, whether a door is completely opened or not can be determined, only when the door body is completely opened, a door opening hydraulic signal is emitted, and invalid operation that the elevator door is not completely opened is completely eradicated; and after the door is closed, a plunger latch closing signal and a plunger latchpin locking signal are emitted, double insurance is achieved, in addition, the signals are output in a hydraulic signal mode, an operator can be clear about the working state of the elevator, and themal-operation possibility is reduced.