Heat insulation and fire prevention structure

A heat insulation and fire prevention structure, comprising:

• a fireproof insulated wool (1) and an external fire prevention board (2), wherein the fireproof insulated wool (1) is installed on a fire facing surface of a building structure (6) to be fireproofed, and the external fire prevention board (2) is installed on the side of the fire facing surface of the fireproof insulated wool (1);
• the fireproof insulated wool (1) is formed by splicing a plurality of fireproof insulated wools and a sealing structure (3) is arranged at a seam between the adjacent fireproof insulated wools,
• wherein overlapping splicing is formed between two adjacent fireproof insulated wools of the plurality of insulated wools;
• overlapping parts (33) are arranged at overlapping places;
• the overlapping parts (33) are fixed at the seams near one side of the external fire prevention board (2);
• one end of the overlapping parts (33) is integrally connected with one fireproof insulated wool of the plurality of insulated wools;
• and the other end extends in a direction near the other fireproof insulated wool of the plurality of insulated wools to overlap on the other fireproof insulated wool, such that the overlapping parts form an air cavity between the fireproof insulated wool and the external prevention board.