A package assembly for packaging an object, comprising: a bottom panel; at least one group of side panels (120, 130) foldably connected to the bottom panel along a first direction; a left side panel foldably connected to the bottom panel along a second direction; a right side panel foldably connected to the bottom panel along the second direction, wherein the right side panel is opposite to the left side panel with respect to a center line of the bottom panel; and the first direction is perpendicular to the second direction; and at least one fastener corresponding to the at least one group of side panels (120, 130) respectively, wherein each of the at least one group of side panels (120, 130) includes a left end panel (121, 131), a middle panel (122, 132), and a right end panel (123, 133), the left end panel (121, 131), the middle panel (122, 132), and the right end panel (123, 133) are separately foldable along a fold line (161, 162), the left end panel (121, 131) is foldably connected to the left side panel, the right end panel (123, 133) is foldably connected to the right side panel, and for each of the at least one fastener, the fastener includes a left end and a right end, which are fixedly connected to the left end panel (121, 131) and the right end panel (123, 133) respectively, wherein the left end panel (121, 131) and the right end panel (123, 133) can be folded inwardly respectively against the left side panel and the right side panel to make the fastener contact with an object placed on the bottom panel; and the left side panel together with the left end panel (121, 131) and the right side panel together with the right end panel (123, 133) can be folded outwardly to fasten the fastener such that the object is fixed on the bottom panel. a bottom panel; at least one group of side panels (120, 130) foldably connected to the bottom panel along a first direction; a left side panel foldably connected to the bottom panel along a second direction; a right side panel foldably connected to the bottom panel along the second direction, wherein the right side panel is opposite to the left side panel with respect to a center line of the bottom panel; and the first direction is perpendicular to the second direction; and the right side panel is opposite to the left side panel with respect to a center line of the bottom panel; and the first direction is perpendicular to the second direction; and at least one fastener corresponding to the at least one group of side panels (120, 130) respectively, wherein each of the at least one group of side panels (120, 130) includes a left end panel (121, 131), a middle panel (122, 132), and a right end panel (123, 133), the left end panel (121, 131), the middle panel (122, 132), and the right end panel (123, 133) are separately foldable along a fold line (161, 162), the left end panel (121, 131) is foldably connected to the left side panel, the right end panel (123, 133) is foldably connected to the right side panel, and for each of the at least one fastener, the fastener includes a left end and a right end, which are fixedly connected to the left end panel (121, 131) and the right end panel (123, 133) respectively, wherein the left end panel (121, 131) and the right end panel (123, 133) can be folded inwardly respectively against the left side panel and the right side panel to make the fastener contact with an object placed on the bottom panel; and the left side panel together with the left end panel (121, 131) and the right side panel together with the right end panel (123, 133) can be folded outwardly to fasten the fastener such that the object is fixed on the bottom panel. the left end panel (121, 131) and the right end panel (123, 133) can be folded inwardly respectively against the left side panel and the right side panel to make the fastener contact with an object placed on the bottom panel; and the left side panel together with the left end panel (121, 131) and the right side panel together with the right end panel (123, 133) can be folded outwardly to fasten the fastener such that the object is fixed on the bottom panel.