A hydraulic brake device comprising: a driving device is provided with a pushing block , and the pushing block is located in the cavity room of the housing, said driving device can drive the pushing block to move within the cavity room of the housing; a housing is provided with a cavity room ; a first pump mechanism is mounted in the casing, the first pump mechanism is provided with a first piston and a first chamber below the pushing block , the first piston is arranged in the first chamber , an interval space is formed between the first chamber and the pushing block , the upper end of said first piston is extended out of the first chamber , and the upper end of said first piston is pressed against the lower end of the pushing block ; said pushing block can drive the first piston and output the first braking force to the rear wheel brake ; a second pump mechanism is mounted in the casing, the second pump mechanism is provided with a second piston and a second chamber below the pushing block , the second piston is arranged in the second chamber , an interval space is formed between the second chamber and the pushing block , the upper end of said second piston is extended out of the second chamber , and characterized in that the upper end of the second piston and the lower end of the pushing block have a separation distance; said pushing block can drive the second piston and output the second braking force to the front wheel brake ; so that, by a time difference brake outputted by the first pump mechanism and the second pump mechanism , the rear wheel brake and the front wheel brake can generate a time difference braking action; then, to let the second braking force output by the second pump mechanism greater than the first braking force output by the first pump mechanism , the braking force of the front wheel brake can be greater than the braking force of the rear wheel brake to improve the safety of the vehicle. a driving device is provided with a pushing block , and the pushing block is located in the cavity room of the housing, said driving device can drive the pushing block to move within the cavity room of the housing; a housing is provided with a cavity room ; a first pump mechanism is mounted in the casing, the first pump mechanism is provided with a first piston and a first chamber below the pushing block , the first piston is arranged in the first chamber , an interval space is formed between the first chamber and the pushing block , the upper end of said first piston is extended out of the first chamber , and the upper end of said first piston is pressed against the lower end of the pushing block ; said pushing block can drive the first piston and output the first braking force to the rear wheel brake ; a second pump mechanism is mounted in the casing, the second pump mechanism is provided with a second piston and a second chamber below the pushing block , the second piston is arranged in the second chamber , an interval space is formed between the second chamber and the pushing block , the upper end of said second piston is extended out of the second chamber , and characterized in that the upper end of the second piston and the lower end of the pushing block have a separation distance; said pushing block can drive the second piston and output the second braking force to the front wheel brake ; so that, by a time difference brake outputted by the first pump mechanism and the second pump mechanism , the rear wheel brake and the front wheel brake can generate a time difference braking action; then, to let the second braking force output by the second pump mechanism greater than the first braking force output by the first pump mechanism , the braking force of the front wheel brake can be greater than the braking force of the rear wheel brake to improve the safety of the vehicle. <EOS>