On Tue, Jul 25, 2017 at 09:50:29 +0800, 露露 wrote:

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu

I call virDomainCreate create a transient vm, After a period of time ,I call virDomainDestroy, the vm configure is stil exist， the vm turn to persistent, I don't known the reason.

Did you mean virDomainCreateXML? virDomainCreate actually requires the domain to be persistent since the argument is a virDomainPtr. If you indeed meant virDomainCreateXML then from your description it's impossible to say why that happened. You need to provide information what you did when that happened.