Through analysis, it was found that the main reason for the inferior quality of current Chinese chisel insert bits is the straight carbon steel or chromium steel used to make bit body with low hardness, poor fenacity, weak insert-clampe'd force, poor wear resistance and short service life. For the elimination of existing problems, it is recommended to use fine 40MnMoV alloy steel with good air-cooled performance, high strength, strong insert-clamped force and wear-resistance as bit body so as to improve its service life, reduce drilling cost and bring about remarkable economical and social benefits.