https://developer.valvesoftware.com/wiki/Valve_Hammer_Editor
Download the Source SDK. Prepare to read a lot of documentation.

引用自 Tito Shivan：

Prepare to read a lot of documentation.

He's not kidding. There's TONS. But if you work through it and stick at it then you'll be able to pull off some master pieces. :)

Learn the basics through documentation and tutorials.
I dont think you have to read everything on the site mentioned above.
The best way to learn is to try and experiment inside Hammer editor.

Source SDK, and Hammer. Make sure you have Team Fortress 2 selected before starting hammer. Make sure you have a bit of knowledge for mapping, too.

To make even a half-way decent map for TF2, you need to understand what makes TF2, TF2 (if you're making a traditional map of course; pl, plr, cp, koth, arena, etc. it's necessary to understand the styles BLU and RED). You also NEED a good 50% reading all kinds of guides and materials/tutorials and 50% hands on experience in Hammer.

It's frustrating. I know. You won't learn it all at once or not make any mistakes, BUT if you put your mind to it and don't let people bug the ♥♥♥♥ out of you, you can do anything Source is capable of.

Oh, im over trying to make a level, i lost intrest over time xD and im too lazy to do all this