The invention relates to the technical field of film pasting equipment, and particularly discloses a film pasting device and a production line. The film pasting device comprises a bracket, a driving part, a pressing head, an attachment head assembly and a pressure detection piece. The driving part is connected to the bracket, the pressing head is connected to the output end of the driving part, and the driving part can drive the pressing head to reciprocate in the vertical direction, the attachment head assembly is used for abutting against a film, the attachment head assembly is movably clamped to the pressing head, can move in the vertical direction relative to the pressing head and can reciprocate in the vertical direction along with the pressing head, and the pressure detection piece is connected to the upper end of the attachment head assembly; when a gap is formed between the attachment head assembly and the film, the attachment head assembly is clamped to the pressing head, and a preset gap is formed between the pressing head and the pressure detection piece; and when the attachment head assembly drives the diaphragm to make contact with a product, the pressing head slides in the vertical direction relative to the attachment head assembly, or the pressing head abuts against the pressure detection piece. According to the film pasting device, the pressure of the attachment head assembly on the film can be accurately controlled, and it is avoided that a product is damaged or the film is not firmly bonded.