你问的问题牵涉到刑法中的公民逮捕权一下摘抄于某第三方网站： http://singaporelegaladvice.com/can-a-civilian-arrest-a-criminal-in-singapore/ section 66 of the Criminal Procedure Code allows civilians (ordinary citizens who are not police officers) to arrest the criminal, but only if the offender has, in the civilian’s view, committed an arrestable offence. The civilian must, without unnecessary delay, then hand over the arrested person to a police officer or take him to a police station. 入室行窃（香港叫做爆窃Burglary)绝对是可以抓的。 回到楼主的事情，严格意义上来说，criminal trespass也是可以抓的。风险在于抓人如果抓错了，后果还是有点严重的，False Imprisonment。所以我只是说“有可能有问题”