The utility model discloses a throw promotion instrument of getting safely suitable for electron list, multiple -shot survey member, include: urceolus 2, platform sling 3, pressure disk 4, grapple 5 and jib 6, wherein, grapple 5 is two at least, 5 middle parts of every grapple are all through the periphery of transverse rotational hinge symmetric connection at platform sling 3, on 5 pivots of grapple reach, the hypomere forms bow -shapedly or the arc structure, 5 upper segments of grapple are equipped with the axial chute, 5 hypomeres of grapple are equipped with the couple, platform sling 3 is fixed in 2 inside of urceolus together with the platform sling, pressure disk 4 and jib 6 fixed connection, 6 times tip on the jib are pegged graft with 3 axials on the platform sling and are moved the cooperation, the neighboring of pressure disk 4 constitutes sliding fit with the axial chute of 5 upper segments of grapple, and urceolus 2 radial movement is followed to the couple that drives 5 hypomeres of grapple. This instrument easy operation, more high -efficient strengthens the survey was thrown to electron list, multiple spot security and standardization simultaneously.