The invention relates to a bottom guard plate structure of a front bumper. The structure comprises a bottom protection plate body, the bottom protection plate body is installed between a front end frame and the front bumper, the front end of the bottom protection plate body is in lap joint with the front bumper, the rear end of the bottom protection plate body is fixedly connected with a lower cross beam of the front end frame, and a gap between the front bumper and the front end frame is sealed to achieve the effect of improving the whole vehicle wind resistance and the cabin heat dissipationperformance; and a shank supporting cross beam and transverse and vertical grid ribs are arranged on the bottom protection plate body, the transverse and vertical grid ribs are arranged in the lap joint area of the bottom protection plate body and the front bumper, and the shank supporting cross beam is arranged at the rear portions of the transverse and vertical grid ribs. When a pedestrian collides, the transverse and vertical grid ribs play a role in preliminary buffering and energy absorption, and the shank supporting cross beam behind the transverse and vertical grid ribs plays a role inmain energy absorption and supporting. In pedestrian protection leg type collision, the integrated shank supporting cross beam absorbs collision energy, so that light weight is achieved, and impact energy on the lower portion of the shank of a pedestrian can be effectively absorbed.

本发明涉及一种前保险杠底部护板结构。该结构，包括底部护板本体，底部护板本体安装在前端框架和前保险杠之间，底部护板本体前端与前保险杠搭接，后端与前端框架的下横梁固定连接，封闭前保险杠与前端框架之间的空隙，起到改善整车风阻及机舱散热性能的作用；底部护板本体上设有小腿支撑横梁和横竖网格筋，横竖网格筋设置在底部护板本体与前保险杠搭接区域，小腿支撑横梁设置在横竖网格筋后部。行人碰撞时横竖网格筋起到初步缓冲及吸能作用，其后的小腿支撑横梁则起主要吸能和支撑作用；在行人保护腿型碰撞中由其集成的小腿支撑横梁吸收碰撞能量的结构，即实现了轻量化，又可以有效吸收行人小腿下部的冲击能量。