Is the glass in front of the lens of Canon eos 550d 18-55 broken?

The most critical issue now is that you take a photo to see if it affects the imaging. Don't fix it if it doesn't affect it.

If it does, it depends on which model 18-55 you use. Anti-shake together with is, which has some maintenance value. Without it, it is not worth repairing. Buy a second-hand 300-350, and you can also buy 450-500 with is. Repairing and replacing the lens requires a certain amount of labor and material costs, and the calculated price is estimated to be the money of a second-hand lens. If you don't have Canon special maintenance department there, you can call 400622666 for consultation, and they may give you a preliminary estimate.

There are many ways to buy second-hand lenses online. If the price is high, you can buy a second-hand lens for fun or upgrade it directly to Longtengshima's 18- 135 or 17-50 f2.8.