The utility model relates to a water tank guide slot among high -speed rod rolling between rolling mill frame, include the water tank guide slot of forming by guide slot body, catchment tube socket and tube socket upper cover, forming the steel passageway by guide slot curb plate and guide slot bottom plate on the guide slot body, and catchmenting tube socket and tube socket upper cover to closing the after -fixing in guide slot body tapping side, it is linked together to the poroid passageway that closes the back and the form steel passageway of crossing with the guide slot body, and the tapping of poroid passageway side is described for trumpet - shaped, it is equipped with the collecting box on the tube socket to catchment, establishes the annulus in catchment tube socket and the tube socket upper cover respectively, the delivery port and the annulus intercommunication of collecting box, and the poroid passageway of opening orientation of annulus is inboard, the tube socket that catchments is connected with tube socket upper cover detachably. The utility model discloses with rolled piece smoothly in leading -in next frame rolling mill, can be according to the rolling technology requirement, there is the control rolled piece temperature of purpose, implement the cooling to the rolled piece, make its each rolling temperature who reaches the technological requirement.