The invention discloses a rail clamp device for a high-speed rail transportation mode. The rail clamp device for the high-speed rail transportation mode is mainly used for passengers in high-speed rail transportation and consists of a rail clamp and an inverted-T-shaped rail; the rail clamp mainly comprises a lifting oil cylinder, a lifting piston, a clamping oil cylinder A, a clamping piston A, aclamping oil cylinder B and a clamping piston B; and according to the working principle of the rail clamp device for the high-speed rail transportation mode, when a shuttle bus is in butt joint witha transition carriage, the lifting piston falls to drive a clamping piece A and a clamping piece B to move downwards, when the clamping piece A and the clamping piece B fall and are positioned on twosides of an upper plate of the inverted-T-shaped rail, hydraulic oil is pumped into an oil inlet tube of the clamping oil cylinder A, and pushes the clamping piston A to move rightwards, and meanwhile, the hydraulic coil enters the clamping oil cylinder B through a bypass oil tube and pushes the clamping piston B to move right wards to tighten the upper plate of the inverted-T-shaped rail; and theworking principle in which the rail clamp releases the upper plate of the inverted-T-shaped rail and resets is consistent to the foregoing working principle, but actions are opposite.