The invention provides a pet fence. The pet fence device is simple in structure and easy to disassemble and maintain, can be placed in a superimposed mode after dismantling, and does not occupy too much space. The pet fence includes at least six coamings, the upper parts and lower parts of the coamings are connected one to one through connection pieces, and a spatial region in which pests can moveis formed through the coamings; the upper part of the fence is further provided with a shed frame. The shed frame is composed of a central connecting piece and six support rods; the central connecting piece is provided with a movable track for each support rod, and the movable track is used for spreading or retracting the support rods, just like umbrellas are spread and retracted. The central connecting piece is further provided with a circular clamping piece used for fixing rain keep-out cloth installed on the shed frame. When the fence is in use, the circular clamping piece is removed fromthe central connecting piece firstly, then the rain keep-out cloth is installed, and finally the circular clamping piece fixes the rain keep-out cloth on the shed frame.