diff --git a/SKPhotoBrowser/SKPagingScrollView.swift b/SKPhotoBrowser/SKPagingScrollView.swift
index 3332f4d9..9bcf5684 100644
--- a/SKPhotoBrowser/SKPagingScrollView.swift
+++ b/SKPhotoBrowser/SKPagingScrollView.swift
@@ -44,26 +44,24 @@ class SKPagingScrollView: UIScrollView {
         recycledPages.removeAll()
     }
 
-    func loadAdjacentPhotosIfNecessary(_ photo: SKPhotoProtocol, currentPageIndex: Int) {
+    func loadAdjacentPhotosIfNecessary(_ photo: SKPhotoProtocol, currentPageIndex: Int, preLoadNum: Int = 1, nextLoadNum: Int = 1) {
         guard let browser = browser, let page = pageDisplayingAtPhoto(photo) else {
             return
         }
         let pageIndex = (page.tag - pageIndexTagOffset)
         if currentPageIndex == pageIndex {
-            // Previous
-            if pageIndex > 0 {
-                let previousPhoto = browser.photos[pageIndex - 1]
+            for i in max(pageIndex - preLoadNum, 0)...(pageIndex + nextLoadNum) {
+                guard i < numberOfPhotos else {
+                    break
+                }
+                guard pageIndex != i else {
+                    continue
+                }
+                let previousPhoto = browser.photos[i]
                 if previousPhoto.underlyingImage == nil {
                     previousPhoto.loadUnderlyingImageAndNotify()
                 }
             }
-            // Next
-            if pageIndex < numberOfPhotos - 1 {
-                let nextPhoto = browser.photos[pageIndex + 1]
-                if nextPhoto.underlyingImage == nil {
-                    nextPhoto.loadUnderlyingImageAndNotify()
-                }
-            }
         }
     }
     
diff --git a/SKPhotoBrowser/SKPhotoBrowser.swift b/SKPhotoBrowser/SKPhotoBrowser.swift
index d569a3d1..b4e161c1 100644
--- a/SKPhotoBrowser/SKPhotoBrowser.swift
+++ b/SKPhotoBrowser/SKPhotoBrowser.swift
@@ -15,6 +15,8 @@ open class SKPhotoBrowser: UIViewController {
     // open function
     open var currentPageIndex: Int = 0
     open var initPageIndex: Int = 0
+    open var preLoadNum: Int = 1
+    open var nextLoadNum: Int = 1
     open var activityItemProvider: UIActivityItemProvider?
     open var photos: [SKPhotoProtocol] = []
 
@@ -181,7 +183,10 @@ open class SKPhotoBrowser: UIViewController {
     }
     
     open func loadAdjacentPhotosIfNecessary(_ photo: SKPhotoProtocol) {
-        pagingScrollView.loadAdjacentPhotosIfNecessary(photo, currentPageIndex: currentPageIndex)
+        pagingScrollView.loadAdjacentPhotosIfNecessary(photo,
+                                                       currentPageIndex: currentPageIndex,
+                                                       preLoadNum: preLoadNum,
+                                                       nextLoadNum: nextLoadNum)
     }
     
     // MARK: - initialize / setup
diff --git a/SKPhotoBrowserExample/SKPhotoBrowserExample/FromWebViewController.swift b/SKPhotoBrowserExample/SKPhotoBrowserExample/FromWebViewController.swift
index 50998e6b..ea9c5c2f 100644
--- a/SKPhotoBrowserExample/SKPhotoBrowserExample/FromWebViewController.swift
+++ b/SKPhotoBrowserExample/SKPhotoBrowserExample/FromWebViewController.swift
@@ -23,6 +23,8 @@ class FromWebViewController: UIViewController, SKPhotoBrowserDelegate {
         let browser = SKPhotoBrowser(photos: createWebPhotos())
         browser.initializePageIndex(0)
         browser.delegate = self
+        browser.preLoadNum = 10
+        browser.nextLoadNum = 10
         
         present(browser, animated: true, completion: nil)
     }