The invention provides a universal spanner. The universal spanner comprises a body, the body comprises a fixed jaw part and a handle part, wherein the fixed jaw part is connected with the handle part, and the handle part can be held by a user; the universal spanner comprises a movable jaw, the movable jaw is pivoted to the fixed jaw part and comprises a clamping portion and at least one ratchet portion, the clamping portion and the ratchet portions are correspondingly located at the two opposite ends of the movable jaw, the clamping part can pivot relative to the body to be close to or away from the fixed jaw part along with the movable jaw, the fixed jaw part and the movable jaw can jointly clamp an object, and the ratchet portions are provided with a plurality of tooth grooves; and theuniversal spanner further comprises a clamping set, the clamping set is pivoted to the handle part and comprises a clamping piece, and the clamping piece pivots relative to the body to be selectivelyclamped on any tooth groove of the ratchet portions along with the clamping set.