The utility model belongs to the technical field of stock anchor construction, grow up under the broken geology condition in tunnel in order to solve rich water, existing railway tunnel concrete bottom disease treatment short -and -medium anchor time of work progress, high anchor power, big anchorage holes's a construction difficult problem, the utility model provides a can improve anchor rod device of anchor power fast, including bolt, anchor backing plate and the body of rod, be connected with the ascending reinforcing bar of a plurality of slopes end on the body of rod, be the heliciform along body of rod length direction between the reinforcing bar end and arrange. The utility model discloses an increase the reinforcing bar end unanimous with the tensile direction on this anchor rod device body of rod, increased stock and country rock injection degree, shown the withdrawal resistance that has improved the stock, owing to add the reinforcing bar end on the body of rod, needed increase anchorage holes drilling diameter in the construction, improved the anchorage holes construction to the collapse adaptability in hole of broken surrounding rock.