Abstract:Under auto_controlled temperature and light length in small rooms, using the way of twice regression general design, growing of male_Tetrangchus truncatus Ehara was studied.The results shown: In the time of covering one generation, the temperature effect was much deeper than the light length for growing and the temperature was related to the light length, but was not marked.The time is the shortest of covering one generation under the condition of 33.4 ℃、11.53 h/d and the days are 4.89.