Do they all need exactly the same amount of crop and same positioning of crop?
If so, create a 'canvas size' action. Then go to File > Automate > Batch. Select your images and apply your Canvas Size action.
If each image needs a unique input, I can't think of a way to batch that.
Thank you, but what is 'canvas size' action?
I just want to trim the 'blank page' around my images.
Photoshop has a facility to record a set of repetitive actions which you can run in the future.
Canvas Size is a means to change the canvas size (not to be confused with resampling the image). So if you had a canvas of (say) 200px x 200px. If you set canvas size to 180px x 180px, you would reduce the canvas size by 10px on each side. (crop).
What do you mean by 'blank page'? Why have images got blank page?
Image > Trim, based off transparency, upper left or lower right pixel colour?
Thank you! It works!