The utility model provides a pair of flexible fast poor protection device, be equipped with closing inner cavity in the shell, be equipped with in closing inner cavity and separate the piston for epicoele and cavity of resorption with closing inner cavity, be provided with the member on the piston, the intracavity is equipped with the elastic component under, be equipped with a connection structure on the member, be equipped with the 2nd connection structure on the shell, this flexible fast poor protection device has two interior cushion effects, first cushion effect is the elastic acting force of elastic component, the elastic acting force of elastic component can offset partly technical staff effort that the in -process produced that drops, a second cushioning effect power is that the gas of intracavity is down compressed in the removal of piston, gaseous produced reaction force is a second cushioning effect power promptly, partly technical staff effort that the in -process producedthat drops also can be offset to this effort, this flexible fast poor protection device simple structure, light in weight just has good shock -absorbing capacity, be favorable to carrying of technicalstaff, additionally, this flexible fast poor protection device can used repeatedly.