A refrigerator, comprising: at least one installation foot, disposed at a bottom of the refrigerator, the bottom of the refrigerator being provided with a threaded hole, and a screw rod being in a screwed connection with the threaded hole, wherein the installation foot, comprises: a support base, a part of which forms a first step portion and a second step portion; a roller wheel, rollably disposed below the second step portion; and an adjustment portion, provided with the screw rod and an adjustment rotary disc, the screw rod being rotatably disposed at the first step portion, and the adjustment rotary disc being fixedly connected to the screw rod or integrated with the screw rod to form a one-piece part so as to drive the screw rod to rotate, characterized in that, the first step portion is provided with an unthreaded hole running through a thickness direction of a main body plate surface of the first step portion; the adjustment portion is positioned above the unthreaded hole; and the installation foot further comprises a connecting piece, one end of which is fixedly connected to the adjustment portion or integrated with the adjustment portion to form a one-piece part, and the other end of which is matched with a lower peripheral edge of the unthreaded hole to limit the freedom of the adjustment portion to move in a straight line relative to the first step portion in its rotation axis direction, wherein a bottom hole is reserved in the center of a bottom of the adjustment portion; and the connecting piece comprises: a screw having a main body portion screwed into the bottom hole, and a head portion located under the main body portion and engaged with the lower peripheral edge of the unthreaded hole; and a washer, disposed between the head portion and the adjustment portion, wherein a first annular flange and a second annular flange are formed on a lower surface of the adjustment portion; the central axis of the first annular flange is coaxial with that of the second annular flange; and the second annular flange is higher than the first annular flange; the unthreaded hole allows the first annular flange to extend thereinto and rotatably fit therewith; and the second annular flange is pressed against the first step portion. a support base, a part of which forms a first step portion and a second step portion; a roller wheel, rollably disposed below the second step portion; and an adjustment portion, provided with the screw rod and an adjustment rotary disc, the screw rod being rotatably disposed at the first step portion, and the adjustment rotary disc being fixedly connected to the screw rod or integrated with the screw rod to form a one-piece part so as to drive the screw rod to rotate, characterized in that, the first step portion is provided with an unthreaded hole running through a thickness direction of a main body plate surface of the first step portion; the adjustment portion is positioned above the unthreaded hole; and the installation foot further comprises a connecting piece, one end of which is fixedly connected to the adjustment portion or integrated with the adjustment portion to form a one-piece part, and the other end of which is matched with a lower peripheral edge of the unthreaded hole to limit the freedom of the adjustment portion to move in a straight line relative to the first step portion in its rotation axis direction, wherein a bottom hole is reserved in the center of a bottom of the adjustment portion; and the connecting piece comprises: a screw having a main body portion screwed into the bottom hole, and a head portion located under the main body portion and engaged with the lower peripheral edge of the unthreaded hole; and a washer, disposed between the head portion and the adjustment portion, wherein a first annular flange and a second annular flange are formed on a lower surface of the adjustment portion; the central axis of the first annular flange is coaxial with that of the second annular flange; and the second annular flange is higher than the first annular flange; the unthreaded hole allows the first annular flange to extend thereinto and rotatably fit therewith; and the second annular flange is pressed against the first step portion. a screw having a main body portion screwed into the bottom hole, and a head portion located under the main body portion and engaged with the lower peripheral edge of the unthreaded hole; and a washer, disposed between the head portion and the adjustment portion, wherein a first annular flange and a second annular flange are formed on a lower surface of the adjustment portion; the central axis of the first annular flange is coaxial with that of the second annular flange; and the second annular flange is higher than the first annular flange; the unthreaded hole allows the first annular flange to extend thereinto and rotatably fit therewith; and the second annular flange is pressed against the first step portion.