In this paper, the strained SiGe-on-Insulator (SGOI) p-MOSFET and Si-on-Insulator (SOI) p-MOSFET are respectively studied via 2-D numerical simulation by ISE TCAD software. The results indicate that compared with the conventional SOI p-MOSFET, the drain-source saturation current of SGOI p-MOSFET almost more than twice, the sub-threshold current of SGOI p-MOSFET has 1～3 orders of magnitude higher than that of SOI p-MOSFET. Because Ge alloy mole fraction is an important basic parameter to the strained SiGe channel MOSFET, the effect of Ge alloy mole fraction on the electrical characteristics of the SGOI p-MOSFET is in depth study in this paper. With the increasing of Ge alloy mole fraction, the overall electrical properties of SGOI p-MOSFET are improved.The strained SiGe-on-Insulator (SGOI) p-MOSFET and Si-on-Insulator (SOI) p-MOSFET were studied via 2-D numerical simulation by ISE TCAD software, respectively. The results indicate that the drain-source saturation current of SGOI p-MOSFET is almost more than twice that of conventional SOI p-MOSFET. The sub-threshold current of SGOI p-MOSFET is 1～3 orders of magnitude higher than that of SOI p-MOSFET. Because Ge alloy mole fraction is an important parameter for the strained SiGe channel MOSFET, its effect on the electrical characteristics of the SGOI p-MOSFET was studied in detail. With the increasing of Ge alloy mole fraction, the overall electrical properties of SGOI p-MOSFET were improved.