The ways to obtain new types of axicons and Bessel beams more effectively and easily have always been the focus of researchers. This paper proposes an axicon made of liquid crystal material with cone angle adjusted by voltage and introduces the characteristics of the proposed liquid crystal axicon. This type of liquid crystal axicon is controlled by two voltages, one of which is fixed, and the cone angle of the axicon is altered by changing the other voltage. The characteristics of the liquid crystal axicon are tested. The experimental results show that the liquid crystal axicon can modulate the incident light similar to the traditional axicon and realize the continuous change of the cone angle. Finally, an imaging system using a liquid crystal axicon is built, and the extended depth-of-field imaging is achieved by this system. The liquid crystal axicon provides new ideas and methods for generating Bessel beams and extending the depth of field.