The invention discloses a reference block-combined type test device for a vehicle-mounted pavement crack detection system and aims to realize that testing of the vehicle-mounted pavement crack detection system is achieved by adopting a reference block combination mode. The reference block-combined type test device for the vehicle-mounted pavement crack detection system mainly comprises reference blocks (1) and a base (2). The reference block-combined type test device for the vehicle-mounted pavement crack detection system is small in occupied space, simple in structure, high in test accuracy, simple in operation, easy to install, relatively low in cost and reliable in performance.