进入phpmyadmin，运行如下代码

TRUNCATE TABLE cataloginventory_stock_item;
TRUNCATE TABLE cataloginventory_stock_status;
TRUNCATE TABLE cataloginventory_stock_status_idx;
TRUNCATE TABLE catalog_category_product;
TRUNCATE TABLE catalog_category_product_index;
TRUNCATE TABLE catalog_product_entity;
TRUNCATE TABLE catalog_product_entity_datetime;
TRUNCATE TABLE catalog_product_entity_decimal;
TRUNCATE TABLE catalog_product_entity_int;
TRUNCATE TABLE catalog_product_entity_media_gallery;
TRUNCATE TABLE catalog_product_entity_media_gallery_value;
TRUNCATE TABLE catalog_product_entity_text;
TRUNCATE TABLE catalog_product_entity_varchar;
TRUNCATE TABLE catalog_product_flat_1;
TRUNCATE TABLE catalog_product_index_eav;
TRUNCATE TABLE catalog_product_index_eav_idx;
TRUNCATE TABLE catalog_product_index_price;
TRUNCATE TABLE catalog_product_index_price_idx;
TRUNCATE TABLE catalog_product_index_price_tmp;
TRUNCATE TABLE catalog_product_option;
TRUNCATE TABLE catalog_product_option_price;
TRUNCATE TABLE catalog_product_option_title;
TRUNCATE TABLE catalog_product_relation;
TRUNCATE TABLE catalog_product_super_attribute;
TRUNCATE TABLE catalog_product_super_attribute_label;
TRUNCATE TABLE catalog_product_super_link;
TRUNCATE TABLE catalog_product_website;
TRUNCATE TABLE catalogsearch_fulltext;
TRUNCATE TABLE catalogsearch_query;