The utility model discloses an instrument anti -falling device, including the couple, the couple is provided with locking buckle, and locking buckle's upper portion is located the inboard of couple, and install on the couple locking buckle's lower part, the fixed column is connected to the connecting rod that passes through of couple lower part, and the fixed orifices has been seted up to the inside of fixed column, solid fixed ring is installed at the top of fixed orifices, and the sub -unit connection of fixed orifices has the fixed plate, installation winding post on the fixed plate, winding post are provided with the elasticity rope, and the one end of elasticity rope is connected on solid fixed ring, and the other end of elasticity rope is connected on the fixed plate, and the sub -unit connection of fixed plate has the instrument. This instrument anti -falling device, elasticity rope is accomodate to the fixed orifices, when not using, prevents that the elasticity rope is too long, and it is troublesome to produce unnecessary, during the use, can take out, even accidentally drop and drop, also can follow the rope, retracts it, and the winding post can prevent the simple winding of elasticity rope from knoing, when avoiding use next time, loses time and unhitches to the factor of safety of work has been improved.