CHILD SAFETY SEAT AND ASSEMBLY SYSTEM WARNING DEVICE THEREOF

An assembly system warning device (100) includes a first assembly member (11), a second assembly member (12), a main circuit (31), a power supply (312), an alarm device (311), a first circuit (32), a first switch (21), a second circuit (33) and a second switch (22). When the first assembly member (11) is located at an assembly position and the second assembly member (12) is located at an idle position, the main circuit (31) and the second circuit (33) are connected in series to form a closed circuit. When the second assembly member (12) is located at an assembly position and the first assembly member (11) is located at an idle position, the main circuit (31) and the first circuit (32) are connected in series to form a closed circuit.