The invention discloses a groove-gate SOI LIGBT device, and relates to semiconductor power device technologies. The groove-gate SOI LIGBT device comprises a substrate, a buried oxide layer, an N-type buffer layer, an anode P<+> region, an anode metal, an N-type drift region, a field oxide layer, a front metal dielectric layer, a P<+> region, an N<+> region, a polysilicon groove gate, an LIGBT device gate oxide layer, a P-type channel region, a polysilicon groove-gate metal and a cathode metal, the cathode metal is connected with the P<+> region and the N<+> region, and the P<+> region 10 is arranged between the N<+>region 11 and the anode P<+> region 4. The groove-gate SOI LIGBT device reduces the electric field intensity around the gate oxide layer, prevents a hot carrier from being implanted into the gate oxide, and improves the reliability of the device.