Marine diesel engine fuel pressure acquisition buffer

The invention discloses a marine diesel engine fuel pressure acquisition buffer which comprises a buffer tank, a joint body and a siphon, the buffer tank comprises an inverted-U-shaped tank body and abase, damping liquid with fluidity is arranged in the inverted-U-shaped tank body, and an inlet and an outlet are formed in the two sides of the top of the inverted-U-shaped tank body respectively. The joint body comprises a threaded sleeve and a threaded pipe, and a throttling hole is formed in the bottom of the threaded pipe. The siphon is vertically arranged on one side in the inverted-U-shaped tank body, a suction port in the lower end of the siphon stretches into the damping liquid, the upper end of the siphon is screwed to the lower end of the outlet, and a pressure gauge connector is screwed to the upper end of the outlet. The pressure fluctuation in the fuel pipe of the diesel engine is effectively relieved. When fuel oil enters the inverted-U-shaped tank body through the joint body, the pressure fluctuat