A rapid ratchet wrench capable of being used in one hand comprises a handle, a wrench head, pawls, and a tensioner head, wherein the wrench head is arranged at the top end of the handle, and a left pawl and a right pawl are arranged at positions close to the handle in a sleeve hole. The tensioner head is mounted at the top end of a control mechanism, and a propelling head is arranged at the tail end of the control mechanism; and the adjacent sides of the left pawl and the right pawl are respectively provided with a touch head in a staggered manner, the tensioner head can respectively touch one of the touch heads and ejects the corresponding pawl to make same open outwards, and the other touch head is in the working position.