How to focus SLR camera accurately? Sometimes the camera focus is not what I want when shooting local people.

Use multi-point autofocus and let the camera determine the focus position for you. The camera doesn't know where you want the focus, so this will happen.

There are several focusing methods for SLR cameras: multi-point focusing (according to your settings, it can be 5 o'clock, 1 1 or above, and the camera determines a focusing position for you according to the built-in program, which is the fastest and is generally used to shoot moving subjects), central point focusing (only the center is in focus, which is the most accurate) and single point focusing (setting an autofocus point for the camera).

Shooting different subjects and different environments requires flexible use of different focusing methods to get the focus you want and clear focusing imaging. SLR cameras are more maneuverable, so I suggest you learn some basic knowledge of photography in order to take satisfactory photos.

I hope it helps you.