Communication single board and communication equipment

The utility model provides a communication single board and communication equipment. A shell of the communication single board is provided with a mounting cavity. The first trigger assembly is installed on the shell. When the communication single board is plugged in the slot position, the first trigger assembly can move relative to the shell, and the transmission assembly can be driven by the first trigger assembly to move relative to the shell. The backflow prevention assembly is connected with the transmission assembly, and the backflow prevention plate arranged on the outer side of the shell can be driven by the transmission assembly to rotate relative to the shell to be switched between the closed state and the open state. When the backflow prevention plate is in the open state, the backflow prevention plate is opened relative to the side wall of the shell, and the included angle between the backflow prevention plate and the shell is an acute angle with the opening facing the bottom of the shell. The oper