Modular vehicle barrier is a modular and portable vehicle interception device, constructed from multiple high-strength alloy L-shaped units assembled into groups. Its core mechanism utilizes the L-shaped structure to mechanically decompose impact forces. Upon collision, it dissipates the kinetic energy of the vehicle through structural deformation and ground friction, effectively intercepting targets ranging from low-speed to high-speed vehicles traveling at up to 80 km/h, including sedans and SUVs.