The invention discloses a braking feeling stepped adjustable brake pedal mechanism which comprises a mounting bracket, a brake pedal, a pedal feeling simulator, a rotating sliding valve device, a sensing sensor and a pedal displacement sensor, wherein the pedal feeling simulator comprises an outer shell, a first elastic component, a second elastic component, a third elastic component, a brake push rod and an emergency switch. Compared with the prior art, the braking feeling stepped adjustable brake pedal mechanism has the advantages that the sensing sensor is used for sensing a brake intention of a driver in advance, the pedal displacement sensor is used for accurately identifying the brake intention of the driver, the rotating sliding valve device is used for adjusting a working feature curve of the pedal feeling simulator by adjusting the flow section and flow damp of hydraulic oil, the structure is compact and reasonable, the operation is convenient and quick, the braking feel is adjustable, the braking feel can be effectively simulated, the braking stability, comfort level and safety are promoted and the braking feeling stepped adjustable brake pedal mechanism has the functions of forecasting the brake intention and emergently braking.