Aiming at the SLAM problem faced by humanoid robot path planning in unknown environment. firstly. based on the analysis of feature region location and information description in the region. a feature extraction algorithm based on LPP has been researched to reduce the computational complexity of SLAM and the sensitivity to wrong data association. https://www.spidertattooz.com/OMEGA-Seamaster-Aqua-Terra-150M-220-10-38-20-02-001-p15833/