yo . can anyone help me to load my enviroment idk about what kinds of file does it support and how do we incude our enviroment and how to create the file
Greetings, and welcome to the forum! I hope that you find your time here to be positive! 
To answer your questions:
The manual goes through the basics of this–take a look at the “Hello World” tutorial, here:
https://docs.panda3d.org/1.10/python/introduction/tutorial/index
Alternatively, I have a beginner’s tutorial that takes one from the fundaments of the engine through to building something that can be distributed–including, naturally, the loading of an environment. You should find that here:
(But do note the “Start Here” page, which describes where the various assets used by the tutorial may be found, as they come from various places!)
Natively, Panda supports its own “egg” and “bam” formats–but there are plugins for other formats.
See the manual here below for more:
https://docs.panda3d.org/1.10/python/pipeline/model-file-formats