Abstract: A brake mechanism of a hydraulic pallet truck is assembled on two wheels, including a box having supporting rods mounted with a spring. A positioning plate is fitted on every two supporting rods above the springs. A pedal is set outside the box through a hood. A horizontal rod is inserted through a lengthy groove into the box. The hood has a sliding groove for the connecting rod to pass through. Two supporting brackets installed on the box have a threaded rod for engaging with the horizontal rod. Connected on each supporting bracket is a connecting plate that is jointed with a swinging arm. A brake wire is inserted through the swinging arms, and connected with a hand brake lever. Fixed aside each connecting plate is a brake pad having an abrasive. Using the pedal or the hand brake lever, the truck can slow down and stop securely.