The invention discloses an automatic stretching-contracting and lifting device of a refrigerator drawer. The automatic stretching-contracting and lifting device comprises the refrigerator drawer, a vertical lifting part and a horizontal stretching-contracting part, wherein the vertical lifting part and the horizontal stretching-contracting part are used for driving the refrigerator drawer. The vertical lifting part comprises a lifting movement tray, a lifting drive component, a drawer base, a sliding rail small end, a left support and a right support. The horizontal stretching-contracting partcomprises three-section sliding rails located on the two sides of the drawer base and a horizontal drive component driving the three-section sliding rails to horizontally move. Chain stretching-contracting mechanisms of the lifting drive component and the horizontal drive component are the same in structure and each comprise a one-way bent chain, a first speed reduction conic gear, a second speedreduction conic gear, a first speed reduction straight gear, a second speed reduction straight gear, a transmission shaft, a chain wheel, a tension wheel mechanism, a transmission fixed shell, a transmission fixed cover plate, a coupling and a motor fixing block. According to one-way bending of the one-way bent chains, thrust principle design can be borne, the device is convenient to use, motionof each mechanism is controlled through a motor, and the functions of automatic stretching-contracting and lifting of the refrigerator drawer are achieved.