A folding and unfolding assembly (201, 301) for folding and unfolding a screen of a terminal, the folding and unfolding assembly (201, 301) comprising a folding and unfolding device (202, 401), a first display screen, and a first antenna group (101, 204, 403); wherein: the first display screen is a flexible screen; the folding and unfolding device (202, 401) is configured to fold or unfold the first display screen by a change in a structural form; and the first antenna group (101, 204, 403) is disposed in the folding and unfolding device; wherein the folding and unfolding device (202, 401) comprises a support assembly (404, 504) which has a contracted state and a supporting state; wherein the first antenna group (101, 204, 403) is disposed in the support assembly; wherein the support assembly (404, 504) comprises at least one set of support bars (902, 1001, 1101), first ends of the at least one set of support bars are coupled to the first display screen, a moving direction of the first ends of the at least one set of support bars (902, 1001, 1101) connected to the first display screen is the same as a direction in which the first display screen is folded or unfolded; wherein the first antenna group (101, 204, 403) is disposed on surfaces of the at least one set of support bars; wherein when the support assembly changes from the supporting state to the contracted state, the at least one set of support bars are configured to change from a state in which the at least one set of support bars are parallel to a direction in which the first display screen is folded or unfolded, to a state in which the at least one set of support bars are at a specified angle with the direction in which the first display screen is folded or unfolded. the first display screen is a flexible screen; the folding and unfolding device (202, 401) is configured to fold or unfold the first display screen by a change in a structural form; and the first antenna group (101, 204, 403) is disposed in the folding and unfolding device; wherein the folding and unfolding device (202, 401) comprises a support assembly (404, 504) which has a contracted state and a supporting state; wherein the first antenna group (101, 204, 403) is disposed in the support assembly; wherein the support assembly (404, 504) comprises at least one set of support bars (902, 1001, 1101), first ends of the at least one set of support bars are coupled to the first display screen, a moving direction of the first ends of the at least one set of support bars (902, 1001, 1101) connected to the first display screen is the same as a direction in which the first display screen is folded or unfolded; wherein the first antenna group (101, 204, 403) is disposed on surfaces of the at least one set of support bars; wherein when the support assembly changes from the supporting state to the contracted state, the at least one set of support bars are configured to change from a state in which the at least one set of support bars are parallel to a direction in which the first display screen is folded or unfolded, to a state in which the at least one set of support bars are at a specified angle with the direction in which the first display screen is folded or unfolded.