Frame assembly, backlight module and display device

A frame assembly (100) includes a carrier (110) and a frame (120). The bearing piece (110) comprises a bottom wall (111), an inner side wall (113) and an outer side wall (115). An opening (112) is formed in the bottom wall (111), the inner side wall (113) is located in the opening (112) and extends from the bottom wall (111) to the vertical direction (D2) away from the bottom wall (111), and the inner side wall (113) comprises a first inner clamping structure (114). The outer side wall (115) extends from the bottom wall (111) in the vertical direction (D2), the outer side wall (115) and the inner side wall (113) are arranged at intervals, and the outer side wall (115) comprises a first outer clamping structure (116). The frame member (120) includes a frame body (121), an inner side wall (123), and an outer side wall (125). The inner side wall (123) extends from the frame body (121), and the inner side wall (123) comprises a second inner clamping structure (124). The outer side wall (125) extends from the fram