The utility model discloses a connection structure between component PC outer wall and floor in advance, connection structure between component PC outer wall and floor in advance is firm, and that isinstalling moreover is efficient, does not need the too many bolt of beating in the installation, and only the installation fastener needed the bolt fastening on precast floor plank outside, other connection did not just need the bolt fastening. The metal connecting piece who adopts the U type pegs graft with the fastener to fixing a position both through the fixed block, can not rocking, the metal connecting piece of U type has set up an inclined plane and has been favorable to the installation.