您需要在每个while循环之后放置wp\\u reset\\u postdata（）。最好的做法是在每个循环之后放置。放置后，您将获得每个自定义帖子类型的图像数据。

<?php

    // The Query
    $query1 = new WP_Query( $args );

    if ( $query1->have_posts() ) {
        // The Loop
        while ( $query1->have_posts() ) {
            $query1->the_post();
            echo \'<li>\' . get_the_title() . \'</li>\';

            //print post thumbnail
            echo get_the_post_thumbnail(get_the_ID(), \'thumbnail\' ); 


            //get post thumb url
            $featured_img_url = get_the_post_thumbnail_url(get_the_ID(),\'full\'); 

        }

        /* Restore original Post Data 
         * NB: Because we are using new WP_Query we aren\'t stomping on the 
         * original $wp_query and it does not need to be reset with 
         * wp_reset_query(). We just need to set the post data back up with
         * wp_reset_postdata().
         */
        wp_reset_postdata();
    }

    /* The 2nd Query (without global var) */
    $query2 = new WP_Query( $args2 );

    if ( $query2->have_posts() ) {
        // The 2nd Loop
        while ( $query2->have_posts() ) {
            $query2->the_post();

            //print post thumbnail
            echo get_the_post_thumbnail( $query2->post->ID, \'thumbnail\' ); 


            //get post thumb url
            $featured_img_url = get_the_post_thumbnail_url($query2->post->ID,\'full\'); 
            echo \'<li>\' . get_the_title( $query2->post->ID ) . \'</li>\';
        }

        // Restore original Post Data
        wp_reset_postdata();
    }

    ?>