我也有类似的问题，这个决定在一定程度上帮助了我。

$('#open_button').magnificPopup({

    type: 'inline',          // Custom settings, never mind
    closeBtnInside: false,   // Custom settings, never mind
    fixedContentPos: false,  // Custom settings, never mind
    fixedBgPos: true,        // Custom settings, never mind

    callbacks: {

        open: function() {                        // When you open the
            $('body').css('overflow', 'hidden');  // window, the element
        },                                        // "body" is used "overflow: hidden".

        close: function() {                       // When the window
            $('body').css('overflow', '');        // is closed, the 
        },                                        // "overflow" gets the initial value.

    }

});

fixedContentPos: true,
overflowY: 'hidden',

这应该行得通！