您可以使用woocommerce_checkout_create_order或woocommerce_checkout_update_order_meta操作挂接。
因此，您将获得：

/**
 * Action hook to adjust order before save.
 *
 * @since 3.0.0
 */
function action_woocommerce_checkout_create_order( $order, $data ) {    
    // Some value
    $my_custom_address = 'My custom address';

    // Update meta data
    $order->update_meta_data( '_billing_address_1', $my_custom_address );
    $order->update_meta_data( '_shipping_address_1', $my_custom_address );
}
add_action( 'woocommerce_checkout_create_order', 'action_woocommerce_checkout_create_order', 10, 2 );

或

/**
 * Action hook fired after an order is created used to add custom meta to the order.
 *
 * @since 3.0.0
 */
function action_woocommerce_checkout_update_order_meta( $order_id, $data ) {    
    // Get an instance of the WC_Order object
    $order = wc_get_order( $order_id );

    // Is a WC_Order
    if ( is_a( $order, 'WC_Order' ) ) {     
        // Some value
        $my_custom_address = 'My custom address';

        // Update meta data
        $order->update_meta_data( '_billing_address_1', $my_custom_address );
        $order->update_meta_data( '_shipping_address_1', $my_custom_address );

        // Save
        $order->save();
    }
}   
add_action( 'woocommerce_checkout_update_order_meta', 'action_woocommerce_checkout_update_order_meta', 10, 2 );