A wide tuning range Butler commonbase low phase noise voltage controlled oscillator is designed by using the lithium tantalate crystal with low capacitance ratio and wide tuning range in this paper.A compromise between seeking high loaded quality factor QL and maintaining oscillator output power is considered in this design. The unloaded quality factor Q0 of Lithium Tantalate crystal is about 1.24×103,and its frequency is about 10.727 MHz. The loaded quality factor QL of the designed Butler oscillator is about 33% of Q0 and the output power is 11 dBm. The measured phase noises are -85 dBc/Hz@10 Hz and -145 dBc/Hz@1 kHz respectively without adding voltage control. After adding a varactor as the voltage control component, a Lithium Tantalate voltage controlled oscillator is designed. Its voltage controlled slope are 86.6×10-6/V and its measured phase noise results are better than -82 dBc/Hz@10 Hz and -142 dBc/Hz@1 kHz when the control voltage range is from 2 V to 10 V. The Lithium Tantalate voltage controlled oscillator design with wide tuning range and low phase noise has been realized.