The invention discloses a food processing device based on steam heating. The food processing device comprises a steam generation boiler and a food heating unit. A steam discharge end of the steam generation boiler is connected with a steam inlet end of the food heating unit through a steam supply pipe. The device is simple in structure. A cylindrical wall body at the lower segment of a container releases heat to a water boiling cavity. Residual heat of smoke is fully utilized. As temperature in the water boiling cavity quickly rises and boiling phenomenon occurs, stable high-pressure steam isgenerated in a pressure accumulation cavity above the water boiling cavity. Therefore, high-pressure steam in the pressure accumulation cavity is discharged out of the steam supply pipe. As a result,the steam supply pipe provides stable high-pressure steam to the food heating unit.