A hydraulic-type time-difference brake apparatus at least comprising: a driving device, is provided with a first driving rod, a second driving rod, a brake starting member and a housing, the upper wall of said housing is provided with a first rod holder and a second rod holder, the inner portions of the first rod holder and the second rod holder are respectively formed with a first chamber and a second chamber; said first driving rod passes through the first rod holder of the housing and extends into the first chamber to drive a first pump mechanism, said second driving rod passes through the second rod holder of the housing and extends into the second chamber to drive a second pump mechanism; said first driving rod is connected to the brake starting member, and the second driving rod is connected to the brake starting member by a sliding device; the sliding process of the sliding device can delay the time the brake starting member activates the second driving rod, so that the start time between the first driving rod and the second driving rod will have a time difference; a first pump mechanism, is arranged in the first chamber of the housing, said first pump mechanism is provided with a first piston and a first elastic member, the upper end of the first piston is pressed against the lower end of the first driving rod; so the first piston of the first pump mechanism can be driven through the first driving rod, and a first braking force can be output to the rear wheel brake of the vehicle; a second pump mechanism, is arranged in the second chamber of the housing, said second pump mechanism is provided with a second piston and a second elastic member, the upper end of the second piston is pressed against the lower end of the second driving rod; so the second piston of the second pump mechanism can be driven through the second driving rod after a very short time difference, and a second braking force can be output to the front wheel brake of the vehicle; therefore, the driver can cause the rear wheel brake and the front wheel brake to generate a time-difference brake by only one braking operation, the rear wheel brake can first generate a braking force on the rear wheel to reduce the speed of the rear wheel, then the front wheel brake will generate a larger braking force on the front wheel more than the rear wheel after a time difference to improve the safety of the vehicle. a driving device, is provided with a first driving rod, a second driving rod, a brake starting member and a housing, the upper wall of said housing is provided with a first rod holder and a second rod holder, the inner portions of the first rod holder and the second rod holder are respectively formed with a first chamber and a second chamber; said first driving rod passes through the first rod holder of the housing and extends into the first chamber to drive a first pump mechanism, said second driving rod passes through the second rod holder of the housing and extends into the second chamber to drive a second pump mechanism; said first driving rod is connected to the brake starting member, and the second driving rod is connected to the brake starting member by a sliding device; the sliding process of the sliding device can delay the time the brake starting member activates the second driving rod, so that the start time between the first driving rod and the second driving rod will have a time difference; a first pump mechanism, is arranged in the first chamber of the housing, said first pump mechanism is provided with a first piston and a first elastic member, the upper end of the first piston is pressed against the lower end of the first driving rod; so the first piston of the first pump mechanism can be driven through the first driving rod, and a first braking force can be output to the rear wheel brake of the vehicle; a second pump mechanism, is arranged in the second chamber of the housing, said second pump mechanism is provided with a second piston and a second elastic member, the upper end of the second piston is pressed against the lower end of the second driving rod; so the second piston of the second pump mechanism can be driven through the second driving rod after a very short time difference, and a second braking force can be output to the front wheel brake of the vehicle; therefore, the driver can cause the rear wheel brake and the front wheel brake to generate a time-difference brake by only one braking operation, the rear wheel brake can first generate a braking force on the rear wheel to reduce the speed of the rear wheel, then the front wheel brake will generate a larger braking force on the front wheel more than the rear wheel after a time difference to improve the safety of the vehicle.