Ocean pretending monitoring system

The invention discloses an ocean pretending monitoring system and relates to the field of ocean offshore defense. The system comprises floating feather (1), a signal conduction line (2), an acousticsdetection device (3), a pretending rope (4) and a monitoring terminal (5), wherein the signal conduction line (2) is arranged in the pretending rope (4); one end of the signal conduction line (2) is connected with the acoustics detection device (3) under water; the other end of the signal conduction line (2) is connected with the monitoring terminal (5); a protection coating is arranged on the surface of the pretending rope (4); a plurality of pieces of floating feather (1) are arranged outside the pretending rope (4) to form a floating article like seaweeds. With pretending of the pretendingrope and the floating feather, information of passing ships, submarines and submerge vehicles within miles around the detection device can be monitored and recorded, the information can be uploaded tothe monitoring terminal an