A protective film pasting method for pasting a protective film on a screen of an electronic device, wherein the protective film includes a protective film sheet and a release layer, the method comprising the steps of: • providing a protective film pasting apparatus comprising a device positioner, and a push mechanism; • positioning the protective film which includes providing the protective film, and positioning the protective film, the protective film comprising a first side and a second side; • positioning an electronic device which includes providing the electronic device, and positioning the electronic device in the device positioner, the electronic device being provided with a screen; • peeling off the release layer of the protective film which includes peeling off the release layer of the protective film from the protective film sheet; • aligning the protective film sheet with the screen and contacting an end of the protective film sheet facing the first side with a respective end of the screen; and • pasting the protective film sheet by pushing and pressing which includes moving the push mechanism from the first side to the second side so as to sequentially paste the protective film sheet on the screen correspondingly, • wherein, an area where the protective film sheet is pasted with the screen defines a contact boundary proximate to the second side, a connection face is formed by the contact boundary and the second side, characterized in that the protective film is positioned in a film sheet positioner included in the film pasting apparatus and the film sheet positioner is aligned with the device positioner, setting a contact angle between the connection face and the screen, before pasting the protective film sheet, and the contact angle gradually decreases along a moving direction of the contact boundary during pasting. • providing a protective film pasting apparatus comprising a device positioner, and a push mechanism; • positioning the protective film which includes providing the protective film, and positioning the protective film, the protective film comprising a first side and a second side; • positioning an electronic device which includes providing the electronic device, and positioning the electronic device in the device positioner, the electronic device being provided with a screen; • peeling off the release layer of the protective film which includes peeling off the release layer of the protective film from the protective film sheet; • aligning the protective film sheet with the screen and contacting an end of the protective film sheet facing the first side with a respective end of the screen; and • pasting the protective film sheet by pushing and pressing which includes moving the push mechanism from the first side to the second side so as to sequentially paste the protective film sheet on the screen correspondingly, • wherein, an area where the protective film sheet is pasted with the screen defines a contact boundary proximate to the second side, a connection face is formed by the contact boundary and the second side, characterized in that the protective film is positioned in a film sheet positioner included in the film pasting apparatus and the film sheet positioner is aligned with the device positioner, setting a contact angle between the connection face and the screen, before pasting the protective film sheet, and the contact angle gradually decreases along a moving direction of the contact boundary during pasting.