【目的】 探究丝棉木金星尺蛾Calospilos suspecta幼虫应对外力干扰时假死行为发生规律和特点以及假死对后续生长发育的影响。【方法】 在实验室条件下，用3 N外力撞击大叶黄杨Buxus megistophylla茎（枝条上有活动的丝棉木金星尺蛾幼虫），统计和分析外力对幼虫假死特征值和随后所化蛹重量的影响。试验分两组：（1）撞击1-4次/d，试验4 d；（2）撞击1次/d，试验1-4 d。【结果】（1）不同撞击次数之间幼虫假死发生率有显著性差异（P<0.05），随着撞击次数的增加，吐丝假死发生率有下降的趋势，且吐丝假死发生率显著高于相同撞击次数的坠地假死发生率（P<0.05）；不同撞击次数之间吐丝假死返回时间、吐丝长度和所化蛹的重量有显著性差异（P<0.05），雌、雄蛹的重量大于对照组（对照组为无外力撞击，雌蛹重量：0.102 g，雄蛹重量：0.088 g）。（2）不同撞击天数之间幼虫坠地假死发生率、吐丝假死返回时间和所化蛹的重量有显著性差异（P<0.05），且吐丝假死发生率显著高于相同撞击天数的坠地假死发生率（P<0.05）。【结论】 外力对丝棉木金星尺蛾幼虫假死的影响因受外力撞击次数和试验天数不同而异，吐丝假死发生率均显著高于坠地假死；幼虫受外力间接撞击后所化蛹后蛹的重量大多增加。

 [Aim]  To investigate the effect of indirect external force on thanatosis in Calospilos suspecta larvae, and on the subsequent growth and development of larvae. [Methods]  Buxus megistophylla branches on which C. suspecta larvae were crawling were impacted by 3 N forces (1, 2, 3 and 4 impacts a day respectively, for 4 d, or one impact a day, for 1, 2, 3 and 4 d respectively). The thanatosis characteristics of larvae and their pupal weight were then statistically analyzed. [Results]  (1) There were significant difference in the frequency of thanatosis among the different treatments (P<0.05). The frequency of spinning thanatosis decreased with increased frequency of impacts but was significantly higher than that of landing thanatosis after the same number of impacts (P<0.05). There were significant difference in the return time, and the length of silk, in spinning thanatosis among the different treatments. There were also significant difference in pupal weight among the different treatments (P<0.05). Female and male pupal weights were higher in treatment than in the control groups (The control group had no external impact, The weight of female pupal: 0.102 g, The weight of male pupal: 0.088 g). (2) There were significant difference in the frequency of landing thanatosis, the return time of spinning thanatosis, and pupal weight, among different treatments when branches were impacted once a day for a different number of days (P<0.05). The frequency of spinning thanatosis was also significantly higher than that of landing thanatosis when branches were impacted once a day for the same number of days (P<0.05). [Conclusion]  The effect of indirect external force on larval thanatosis in C. suspecta varied with impact frequency and the number of trial days. The frequency of spinning thanatosis was higher than that of landing thanatosis in all treatment groups. Larvae subjected to indirect force tended to have higher pupal weight than those in the control groups.