Hello XIN,
Thanks for reaching to us.
Filter by Price is default WooCommerce widget and WoodMart does not control it.
For specialized assistance and potential solutions, I kindly suggest that you reach out directly to the WooCommerce plugin’s support team https://wordpress.org/support/plugin/woocommerce/, who are better equipped to provide you with the guidance you requires or You need to find a third party plugin to achieve more functionality that best suits you.
Regards,
.
