Macbook always reboot after closing the macbook for a while. can't find the solution, Please help

Hi Davidyuibm,

Try these steps to help isolate the cause of the issue. They can also be found inside the article that you linked.

First: Update your software

Make sure that all of your apps are up to date. If any updates are available, back up your Mac, then install them. After installing all available updates, try to reproduce the issue. If successful, move to the next section.

Second: External Device Test

Disconnect all devices and peripherals from your Mac, then try to reproduce the issue. If successful, move to the next section. Otherwise, the issue is related to the device that was previously connected to your Mac.

Third: Internal Hardware Test (Apple Diagnostics)

Start Apple Diagnostics on your Mac, then check the error code that appears onscreen after the test finishes. If you get the success code (ADP000), move to the next section. Otherwise, the issue is likely related to a hardware problem. You can look up the provided error code here: Apple Diagnostics reference codes - Apple Support

Fourth: Safe Mode

At this point the issue is related to software; all of your hardware is fine. Start up in Safe Mode, and do not open any apps. Try to reproduce the issue; if successful, reset NVRAM and the SMC. If the issue still persists after that, reinstall macOS (without erasing your drive).

If you couldn't reproduce the issue, open one of your most commonly used apps, then try to reproduce the issue. Repeat until you've tried all of your most commonly used apps. If you were able to reproduce the issue, the issue is likely related to the app that you just opened.

If you couldn't reproduce the issue, restart normally and try to reproduce the issue. If successful, move to the next section. If the issue still can't be reproduced, Safe Mode repaired your startup disk and fixed the issue.

Fifth: Check your Login Items

Log into your user account, then open System Preferences. Choose Users and Groups. Then, select the Login Items tab. Remove all items from the list, then restart your Mac and attempt to reproduce the issue. If successful, let me know; it's likely related to a background service operated by an app. If you can't reproduce the issue, re-add one of the previous items back to the list, then restart and try to reproduce the issue again. Repeat until the issue is reproduced, or all previous items were re-added to the list.

If you were able to reproduce the issue by adding a Login Item back, the issue is likely related to that app.