Combined wrench with movable head

The utility model discloses a movable-head combined wrench. Relates to a wrench, in particular to an improved structure of a movable-head combined wrench. According to the utility model, the structure of the end part of the wrench handle is improved, so that the function that various wrench heads of the wrench can be quickly replaced is improved. When the wrench head is replaced, the locking ring is pushed backwards, the button cap on the right side is separated from the locking ring, the pin shaft retreats from the connecting hole of the wrench head under the action of the compression spring, and then the wrench head can be taken out. When the wrench head of the required specification or form is inserted and the button cap is pressed down, the pin shaft enters the connecting hole of the wrench head, so that the wrench head is connected with the wrench handle. At the moment, the locking ring moves forwards under the action of the reset spring until the locking ring slides to the side part of the button cap, s