Need Help : WooCommerce Sort by sales

Hi @janfeng, have you tried this?

http://docs.woothemes.com/document/custom-sorting-options-ascdesc/

Do place the code in your current theme’s functions.php file.

Hi, you can try below code:

add_filter( 'woocommerce_get_catalog_ordering_args', 'custom_woocommerce_get_catalog_ordering_args' );

function custom_woocommerce_get_catalog_ordering_args( $args ) {
  $orderby_value = isset( $_GET['orderby'] ) ? woocommerce_clean(  $_GET['orderby'] ) : apply_filters( 'woocommerce_default_catalog_orderby', get_option( 'woocommerce_default_catalog_orderby' ) );

  if ( 'sales_asc_list' == $orderby_value ) {
    $args['orderby'] = 'sales';
    $args['order'] = 'asc';
    $args['meta_key'] = '';
  }

  if ( 'sales_desc_list' == $orderby_value ) {
    $args['orderby'] = 'sales';
    $args['order'] = 'desc';
    $args['meta_key'] = '';
  }

  return $args;
}

add_filter( 'woocommerce_default_catalog_orderby_options', 'custom_woocommerce_catalog_orderby' );
add_filter( 'woocommerce_catalog_orderby', 'custom_woocommerce_catalog_orderby' );

function custom_woocommerce_catalog_orderby( $sortby ) {
  $sortby['sales_asc_list'] = 'Sales (Lowest to Highest)';
  $sortby['sales_desc_list'] = 'Sales (Highest to Lowest)';

  return $sortby;
}