The present invention discloses a high-transparency and high-strength heat shrinkage film, which comprises an inner layer, an outer layer and a middle layer, wherein the inner layer and the outer layers respectively comprise, by weight, more than or equal to 50% of mLLDPE and less than or equal to 50% of LLDPE, the melt indexes of mLLDPE and LLDPE are less than or equal to 0.5 g / 10 min, and the densities of mLLDPE and LLDPE are greater than or equal to 0.920 g / cm<3>. According to the present invention, the inner layer and the outer layer only comprise mLLDPE and LLDPE, and do not use auxiliary agents and other polyethylene materials, such that the formula is simple, and the raw materials are saved; and by using mLLDPE having low melting index and high density and LLDPE having low melting index and high density, the heat shrinkage film has advantages of high tensile strength (more than 30 N), good transparency (the mist degree is 8-15%), good heat-sealing strength (the heat-sealing strength of the existing heat shrinkage film is about 20-25 N while the heat shrinkage film of the present invention is 30-40 N), and good refractive index (more than 90%).