Abstract: A film tearing device for tearing a film on a component to be torn is referred to, includes: an easy-to-tear sticker, including a clamping portion and an adhesive portion disposed adjacently in a first direction; a film tearing roller, including a first portion and a second portion disposed opposite to each other, where the film tearing roller is configured to have a first state and a second state, in the first state, the first portion is matched with the second portion to clamp the clamping portion, and in the second state, the film tearing roller clamping the clamping portion rotates and moves in a second direction parallel to a surface of the component to be torn; a first moving structure for controlling the first portion and/or the second portion to move such that the film tearing roller is in the first state and second state.