Abstract: The traditional mode of Chinese qallnut production is putting sexual aphids once.In recent years, the authors found that putting sexual aphids twice could improve the formation of the Chinese qallnut.In 1994, the authors made some experiments about putting sexual aphids twice.At last the result showed that this technique(putting sexual aphids twice)could improve regular extent that Jiaobei was destributed in the summer hosts, increase volume of Jiaobei, and increase quantity of branches of Jiaobei distribution and the percent of Jiaobei formation. By using this technique, the quantity increased 93.1% and the output increased 117.04%.