The characteristics of vertical cavity surface emitting laser (VCSEL) polarization with cholesteric liquid crystal (CLC) overlay is presented. I-P characteristics, output polarization at different pump currents and output power stability are investigated. The experimental results show that threshold current is increased by 0.35 mA comparing with alone VCSEL at the same operating temperature. Polarization state of CLC-VCSEL is greatly sensitive to input current. Stable output power has been obtained at I=1.4 mA, and effective circle polarization at the range of LCLC= 4.62~5.95 mm is also achieved.