The invention discloses an oblique multi-directional displacement telescopic device which comprises a sliding end displacement device, a fixed end displacement device and a joint crossing girder, wherein two ends of the joint crossing girder are mounted on the sliding end displacement device and the fixed end displacement device; the sliding end displacement device comprises a sliding end base, arear seat, a guide pressure plate, a guide sleeve rail, a rotary ball crown, a rotary ball seat, a sliding end front guide sleeve and a cover plate; the guide pressure plate is fixed with the slidingend base, and the guide sleeve rail, the rotary ball crown, the rotary ball seat and the sliding end front guide sleeve are limited on the sliding end base; the cover plate is connected and fixed withthe guide sleeve rail and is in contact with the joint crossing girder and the rear seat; the fixed end displacement device is composed of a fixed end base, a fixed end front guide sleeve, a fixed end rear guide sleeve, a fixed end cover pressure plate, a rotary ball crown and a rotary ball seat; and the fixed end cover pressure plate tightly presses the joint crossing girder with the rotary ballcrown and the rotary ball seat. The device disclosed by the invention improves the driving comfort, reduces the structure size of an expansion joint mounting groove of a bridge, reduces vibration andnoise, and is convenient to mount, replace and maintain.