By calculating the output synchronous error of the main parts of the flexible explosive circuit,the main factors affecting the output synchronization were analyzed. Two kinds of explosive circuit (one in nine out eccentricity explosive circuit and one in twelve out center explosive circuit) samples based on silver code were produced. The charge of the column and the code were HMX CⅢ. The output performances of these explosive circuit samples were tested. The results show that the function of the explosive circuits can be accomplished. The synchronous error of the circuit is within 200 ns which is better than that of the similar circuit.