The invention discloses a safety seat. The safety seat comprises a seat, wherein at least two shoulder belt holes are formed in a backrest part of the seat along the height direction in layers, and a shoulder belt adjusting groove is formed between the shoulder belt holes for mutual communication. As the at least two shoulder belt holes are formed in the backrest part of the seat of the safety seat disclosed by the invention along the height direction in layers, and the shoulder belt adjusting groove is formed between the shoulder belt holes for mutual communication, the fast adjustment from one height to the next height can be realized under the situation that shoulder belts applied to the safety seat disclosed by the invention do not need to perform any assembly and disassembly. Simultaneously, the adjustment of the shoulder belts on the safety seat disclosed by the invention is very simple and practical.