Based o n the theo ry o f ag ricultural sy stem engineering , o ur multifacto rial a nd multilev el test wi th the so ybean v ariety Pinghuqingren w as carried out using the quadraticsecond o rder reg ressoo n ro ta tion desig n to establi sh the so ybean yield functio n models inag ronomic technolog pakag e. The o ptimization combina tion resulted in a soy bean yieldo f 160 kg or mo re per mu. Scienti fic ag ro nomic technolog y palcag e was furnished fo rPinghuqingren autumn soy bean of cul tiv atio n in large a reas.