Agricultural technological innovation is an important factor to promote the rapid and stable development of agriculture.This paper builds the evaluation index system of agricultural technological innovation ability,including 3 level indicators,14 level two indexes,and uses the entropy TOPSIS method to set the index weight.Then this paper calculates agricultural technological innovation ability in 30 provinces and cities from 2000 to 2014.After that,this paper checks σ convergence and β convergence of agricultural technological innovation ability in the whole country and the east,central and west areas.The result shows that there are no σ convergence and β convergence in the above areas.