Apologies if you’ve already tried/considered these; just wanted to throw these questions out here to get the ball rolling.
Which filament are you using? For example if I use non bambulab filament I usually have to tune it to get good quality prints. (Whereas bambulab filament usually works out of the box w/ the bambu studio settings)
Asides from that, this might appear to be a moisture problem; you could try drying it out or use another role of filament with this same model.
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You might consider printing your model vertically instead of horizontally.
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I believe that @lkraus probably nailed it but it’s hard to give you good feedback without some understanding of how you oriented the model on the build plate and what class of filament you used.
Quality Post = Quality feedback
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@ lkraus , finally i print it vertically, many thanks for all bros suggestion,
i am not using bambulab filament, i change to high quality and print it vertically, thanks for suggestion bros 
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Hi @ lkraus, i think the problem is the very rough above support area
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If you have an AMS lite, I’ve had good results using PETG as the support interface and 0mm separation between supports and printed object; this is because PETG doesn’t stick well to PLA, and even with 0mm separation it comes off easily by hand.
If you don’t have an AMS unit, then you might need to lower the gap between supports and printed part, but not all the way to 0 or they will fuse together.
I agree with this! That should help a lot