The application relates to the field of
biology, and particularly discloses a PCR amplification
system and a PCR
nucleic acid detection method; the PCR amplification
system comprises a PCR additive, the PCR additive comprises tetramethylene
sulfoxide modified gold nanoparticles, and the particle size of the tetramethylene
sulfoxide modified gold nanoparticles is 0.5-1.1 nm; and the amplification method comprises the following steps: S1, configuring a PCR
reaction system, adding template
DNA into the prepared
reaction system to prepare a
mixed solution; S2, placing the
mixed solution in a high-temperature
reaction zone and a low-temperature
reaction zone to perform 30-45 amplification cycles, the temperature of the high-temperature
reaction zone is one fixed temperature or a temperature interval in the range of 94 DEG C-100 DEG C, and the temperature of the low-temperature reaction zone is one fixed temperature or a temperature interval in the range of 50 DEG C-65 DEG C. The method has the advantages of shortening the time of the PCR amplification process.