我想你应该用post_submitbox_misc_actions

add_action( \'post_submitbox_misc_actions\', \'publish_in_frontpage\' );
function publish_in_frontpage($post)
{
    $value = get_post_meta($post->ID, \'_publish_in_frontpage\', true);
    echo \'<div class="misc-pub-section misc-pub-section-last">
         <span id="timestamp">\'
         . \'<label><input type="checkbox"\' . (!empty($value) ? \' checked="checked" \' : null) . \'value="1" name="publish_in_frontpage" /> Publish to frontpage</label>\'
    .\'</span></div>\';
}