How to Crop multiple PNG element
1) Move all the SVG files to a single folder, making sure not to create any subfolders within the collection folder.
2) Open Adobe Photoshop > Window > Action > Click "Load Actions..."
Then load action files that you can download at the link below.
Download Link: Download Action File
3) Execute the Action. Click "File" > Automate > Batch...
4) Apply the Action to the TOTAL folder. All elements will be cropped automatically.
Click "Set, Action(choose the action that you made) > choose... > Select "TOTAL" folder > OK
5) Check the Action has been applied properly. The Artboard size should be adjusted to fit like the left image.