The invention relates to a soft storage tube for preventing a paste body from spilling backwards; a pair of convex and concave occluding chains is arranged vertically on the inner wall of the soft tube at intervals. When the paste is extruded by people to the opening of the front end and the rear part of the soft tube is emptied, the convex and concave occluding chains are occluded under pressure for preventing the paste body from spilling backwards, thus solving various sorts of problems caused by snifting of the material of the common plastic soft tube due to memory and rebound of the material and fundamentally solving the problem that is not solved over the past few decades of the backward spilling of the paste body in lead, aluminum, and aluminum-plastic composite soft tubes; in addition, the tube has the advantages of simple structure, convenient use, saved energy and metal, easy recovery and beneficial environmental protection effect.