The invention provides a novel bridge safety detection device, and relates to the technical field of safety detection. A monitoring in-place station is connected with a monitoring data center through a GPRS wireless communication transmission device. The monitoring in-place station comprises an acquisition water flow sensor, a supporting vibration string sensor, a voltage current type sensor, a pulse type sensor, and a single-chip microcomputer. The acquisition water flow sensor, the supporting vibration string sensor, the voltage current type sensor, and the pulse type sensor are connected with the single-chip microcomputer through data lines. The device is simple in structure, and can rapidly and automatically acquire, store, transmit, and manage data in real time, and safety conditions of a bridge can be observed at any time, thereby preventing unnecessary negligence, reducing potential safety hazard, and reducing risk and economical loss. The device has profound significance for social stability.