最终使用ajax。。。

html；

<a class="remImage" name="<?php echo $attachment->ID; ?>" href="#"><?php _e(\'delete\');?></a>  <input type="hidden" id="att_remove" name="att_remove[]" value="<?php echo $attachment->ID; ?>" />
<input type="hidden" name="nonce" id="nonce" value="<?php echo wp_create_nonce( \'delete_attachment\' ); ?>" />

$(\'.remImage\').live(\'click\', function() {
    var attID = jQuery(this).attr(\'name\');
    jQuery.ajax({
        type: \'post\',
        url: \'/wp-admin/admin-ajax.php\',
        data: {
            action: \'delete_attachment\',
            att_ID: jQuery(this).attr(\'name\'),
            _ajax_nonce: jQuery(\'#nonce\').val(),
            post_type: \'attachment\'
        },
        success: function() {
            console.log(\'#file-\'+attID)
            $(\'#file-\'+attID).fadeOut();    
        }
});

add_action( \'wp_ajax_delete_attachment\', \'delete_attachment\' );
function delete_attachment( $post ) {
    //echo $_POST[\'att_ID\'];
    $msg = \'Attachment ID [\' . $_POST[\'att_ID\'] . \'] has been deleted!\';
    if( wp_delete_attachment( $_POST[\'att_ID\'], true )) {
        echo $msg;
    }
    die();
}