The invention discloses a multipurpose novel thermal-shrinkable film with high stability and a preparation method thereof. The multipurpose novel thermal-shrinkable film with high stability adopts a three-layer structure including a top layer, an interlayer and a bottom layer. The interlayer is composed of the following raw materials: a poly(ethylene terephthalate) polymer, MBS, a polymer compatilizer, a stabilizing agent and a plasticizer. The top layer and the bottom layer have the same composition and are respectively composed of the following raw materials: linear low density polyethylene, plastic optical fiber, inorganic filler stone flour, a light stabilizer and a plasticizer. The film of the invention is a tough thermal-shrinkable film with excellent transparency and double-direction shrink effect. The product has outstanding shrinkage in packaging process, has firm and lasting seal and has a wide shrinkage temperature range. During using process, the film can meet most requirements of automatic and semi-automatic packaging machinery, is an economical and practical product, and can be widely applied to external packing of various products such as food, drugs, disinfectant tableware, stationery and sporting goods, etc.