Small emission control box

The invention discloses a small emission control box. A power board is mounted between a bottom plate and a middle plate, a core plate is mounted in the middle plate, an electric connector used for achieving connection with an airplane signal upwards and connection with a guided missile signal downwards is arranged on one side of the middle plate, in the electric connector, dual concentric contactparts are dismounted into three core wires, a function plate is mounted between the middle plate and a cover plate, and is located above the core plate, meanwhile, the function plate has a function of mutually converting 1553B and RS422 data, the core plate comprises a DSP circuit and an FPGA circuit which are connected, the box is small in size, and can be mounted in a guide emission frame, the1553B and RS422 data can be mutually converted at the same time, data parsing and recombining are achieved, data forwarding between different buses can be achieved, the emission control function is achieved, and guided missile