A weight-limiting roadblock device according to the present invention includes a body, wherein the body is provided with a weight detection device, the weight detection device includes a push rod, and the left side of the weight detection device is also provided with an overweight warning device. The overweight warning device includes a railing. The present invention is provided with a putter to detect moving vehicles to avoid the loss of electrical energy caused by the use of sensors. The device also has a roadblock to intercept vehicles that forcibly break through the railings and prevent illegal vehicles from forcibly passing through. The left side of the roadblock is also equipped with an elastic baffle to protect the vehicle being intercepted to prevent safety accidents such as rollover due to interception. This device has accurate measurement, obvious interception effect, and no hidden dangers. It is suitable for many Kind of traffic intersection.