Ratchet spanner

The utility model discloses a ratchet spanner, comprising a spanner body, the action end in front of the spanner body is provided with a containing space which is provided with a ratchet wheel, sliding grooves are respectively arranged at left and right sides of the containing space, a clamping braking piece is arranged behind the spanner body, two clamping braking pieces are respectively arranged in the sliding grooves, the rear part of the containing space is pivoted to a direction control part, the direction control part comprises a swinging rod, a locating part and a pulling rod which are overlapped top and bottom, synchronization rotation of the locating part and the swinging rod can be realized by rotating the pulling rod, the locating part is pushed and located by the clamping braking pieces, the swinging rod can push the sliding part at one side to promote the clamping braking pieces at the front to move forwards, so as to lead the ratchet part and the ratchet of the clamping braking piece to be meshe