我认为这是WordPress中其他地方评论过的错误，请尝试使用标记的名称而不是ID，这样应该可以：

$args = array(
    \'posts_per_page\' => 3,
    \'tag\' => \'review\',
    \'cat\' => 9,
);
query_posts($args);

我偶然发现了同样的问题，并通过请求MySQL解决了它。

简而言之：get\\u post（$args）将返回类别为MyCategory的帖子OR 标记=MyTag。

你想要的是改变你的OR 到AND .

我的逻辑是直接使用MySQL查询：

查询1=选择所有具有类别MyCat的帖子查询2=选择所有具有标记MyTag的帖子最后：选择查询1和查询2中的所有帖子我使用wpdb 而不是query\\u post（）；

A bit of code （返回类别为MyCat和标记为MyTag的已发布帖子）：

    $query_byTag="
            SELECT wp_posts.ID
            FROM wp_posts, wp_term_relationships, wp_terms
            WHERE wp_posts.ID = wp_term_relationships.object_id
            AND wp_terms.term_id = wp_term_relationships.term_taxonomy_id
            AND wp_terms.name = \'MyTag\'";

    $query_byCat="
            SELECT wp_posts.ID
            FROM wp_posts, wp_term_relationships, wp_terms
            WHERE wp_posts.ID = wp_term_relationships.object_id
            AND wp_terms.term_id = wp_term_relationships.term_taxonomy_id
            AND wp_terms.name = \'MyCat\'";

$query ="
            SELECT      wp_posts.post_title AS title , 
                        wp_posts.post_content AS content,
                        wp_posts.post_date AS blogdate 
            FROM wp_posts
            WHERE wp_posts.post_status = \'publish\'
            AND wp_posts.ID IN (".$query_byTag.")
            AND wp_posts.ID IN (".$query_byCat.")
            ORDER BY wp_posts.post_date DESC ";

$result= $wpdb->get_results($query);

This code works:

$args = array(
    \'tag\' => get_queried_object()->slug, // If permalink like example.com/tag/example-tag, etc.
    \'posts_per_page\' => -1,
    \'tax_query\' => array( 
        array(
            \'taxonomy\' => \'category\', // Taxonomy, in my case I need default post categories
            \'field\'    => \'slug\',
            \'terms\'    => \'interior\', // Your category slug (I have a category \'interior\')
        ),
        ) 
); // Get all posts
$posts_new = get_posts( $args );

SELECT wp_posts.post_name
FROM wp_posts, wp_term_relationships, wp_terms, wp_term_taxonomy
WHERE wp_posts.ID = wp_term_relationships.object_id
AND wp_terms.term_id = wp_term_taxonomy.term_id
AND wp_term_taxonomy.term_taxonomy_id = wp_term_relationships.term_taxonomy_id
AND wp_terms.name = "MY TAG"