The invention discloses polarized angle hot bending protective film and a preparation method thereof. The polarized angle hot bending protective film comprises a PMMA protective layer, a silicone protective layer, an HC coating, an anti-blue-ray coating, a PET substrate layer, a TPU colloid layer, a silica gel release layer and a release film layer which fit one another in sequence from top to bottom, wherein the polarized angle of the PET substrate layer is 30-48 degrees; PET film is subjected to polarization angle die-cut molding reasonably, and the polarization direction of the PET film isin accordance with the polarization direction of a screen, thereby better fitting an unlocking mode, reducing the adverse effects on the unlocking sensitivity, facilitating smooth unlocking of fingerprint under the screen, and enhancing the user experience; TPU is applied to form the TPU colloid layer, so that the polarized angle hot bending protective film is flat adsorbed on the surface of a to-be-bonded object better, and the polarized angle hot bending protective film has an automatic exhausting function, has softness, is easier to hot press and form, does not rebound, can be adsorbed on the surface of a 3D curved screen better, has a good buffering effect, has an explosion-proof effect, has high practicability, and is conducive to widespread popularization and application.