A food processor / juicer of an improved structure comprises a fixed base, a cup assembly, a driving assembly and a vacuum pump assembly. The cup assembly comprises a cup holder, a cup wall and a cup cover; the driving assembly comprises a driving motor, a first output shaft, a clutch and a second output shaft, and a first variable gear is arranged on the second output shaft; the vacuum pump assembly comprises a base frame, a speed change unit and a compression unit, the fixed base is provided with an opening, the compression unit is provided with an air extraction opening, the air extraction opening is connected with one end of a telescopic hose, the cup cover is provided with an air extraction hole, and the other end of the telescopic hose penetrates through the opening, then extends to the cup cover and is connected with the air extraction hole. The food processor / juicer is compact in integrated structure and convenient for a user to operate and carry, manufacturing cost is reduced, occupation on the inner space of the fixed base is reduced, and therefore the size and weight of the fixed base are substantially kept identical with those of an existing frequently-used juicer.