The invention discloses a high-precision laser interference hydrophone, which has the advantages of high precision, low manufacturing time, long cruise duration and the like. The hydrophone comprises a Michelson interference principle-based light path system, a control system and a power supply system; the light path system comprises a laser device, a half-transmission half-reflection spectroscope, a planar reflector and a vibrating plate; the planar reflector and the laser device are arranged on the upper side and the lower side of the spectroscope respectively, the planar reflector is arranged horizontally, and the top surface of the planar reflector is provided with piezoelectric ceramics; the vibrating plate is arranged vertically, the inner surface of the vibrating plate facing the spectroscope is plated with a layer of reflecting film, and a piezoelectric composite material is attached to the outer surface of the vibrating plate; the control system comprises a photoelectric diode and a charge amplifying circuit, and the electrical signals output by the photoelectric diode and the charge amplifying circuit are transmitted to a controller; and the controller is used for calculating the amplitude of measured acoustic signals, and a piezoelectric ceramic driving circuit is connected with the piezoelectric ceramics.