Please help me which are the Juniper devices will support for Zero Touch Provisioning.
It's supported on almost all the platform. You can use the feature explorer is you are looking for the any specific platform support.
In My environment we are using EX8208,EX4200 and SRX240H20 devvices. Is ZTP is supported on those devices. Please let me know.
In general Feature explorer is the source for what specific platforms support each feature. Here is the EX list for zero touch provisioning via dhcp, the ex4200 is support the ex8200 is not.
The older SRX platforms are not supported and the newer series support starts in Junos 17.1
Documentation on the process is in chapter 5 here.