Abstract: Using the method similar to the circuit axioms of matroids, we discussed fuzzy circuit axioms of closed GV fuzzy matroids. 
Firstly, we gave some  properties of fuzzy circuits of G-V fuzzy matroids. Secondly, using these properties, we discussed how to use elementary fuzzy circuit sets to determine G-V fuzzy matroids. Finally, we proposed and proved a fuzzy circuit axiom of closed G-V fuzzy matroids. According to  this  axiom,  a collection of elementary fuzzy sets, a finite number sequence and a mapping of fuzzy sets could  uniquely determine a closed G-V fuzzy matroid under certain conditions.

Key words: matroid, circuit axiom, fuzzy matroid, circuit function, circuit interval, generalized circuit function, circuit range, fuzzy circuit axiom