1 First of all, we need to judge whether there is looseness between the door frame and the door leaf, or whether the hinge is loose. If the width of the door is shaking, then we can fix it with expansion screws, or we can embed iron pieces at the mouth of the cave and weld them, which can solve the problem of instability of the door frame and door leaf. It is better to have more than three connection points, so that the door frame will not shake.

2. If the hinge is loose, it is relatively simple to solve. If you want to solve it, you just need to re-fix the hinge. If it is used for a long time, it can also be replaced. Go to the hardware store and choose the same model and install it at home. Just fix it with screws.

3. When installing the security door, we must also pay attention to the matching size. After all, the security door also has a certain standard size, and it also needs to conform to the appearance of the security door according to the size of the door opening. If not, it will also cause the door frame to shake.

4. When installing, you need to find the value first, then make some adjustments, and finally fix it with a wooden wedge, and then make adjustments, so that it is not easy to shake and deform in the later stage, so it is also very important when installing.