The invention discloses a vehicle line control hydraulic brake system hardware-in-the-loop test bed in order to solve the problem that with respect to an existing test bed, the detection precision is poor, the rapid pressure-buildup speed is too low and the steady-state error is too large. The vehicle line control hydraulic brake system hardware-in-the-loop test bed comprises a real-time platform and a line control hydraulic brake system, the real-time platform comprises a host computer and a data acquisition and exploitation system, and the host computer is in bus connection with the data acquisition and exploitation system; and the line control hydraulic brake system comprises a test sensing system, an experiment table basal body and a brake system execution mechanism. The experiment table basal body is installed on the foundation through a support platform, a left front-wheel brake, a right front-wheel brake, a left rear-wheel brake and a right rear-wheel brake of the experiment table basal body are installed on the support platform, and the test sensing system is connected with the four wheel brakes through brake hard tubes; the test sensing system is connected with the data acquisition and exploitation system through a wire; and the brake system execution mechanism is connected with the test sensing system through a brake hard tube, and the brake system execution mechanism is connected with the data acquisition and exploitation system through a wire.