The invention discloses an acoustic pressure amplification device based on an RC load and a refrigerating machine. The acoustic pressure amplification device is used in the refrigerating machine with a linear compressor. The acoustic pressure amplification device based on the RC load and the refrigerating machine are characterized in that the acoustic pressure amplification device is arranged between the compressor and the load and further comprises an inertia tube and an air reservoir which are arranged in a series-connection mode; and the inertia tube end is connected with a compressor outlet, and the air reservoir end is connected with the load portion of the refrigerating machine. According to the acoustic pressure amplification device based on the RC load and the refrigerating machine, according to the circuit series-connection resonance principle, the acoustic pressure of the linear compressor outlet is amplified, and the output pressure ratio is increased. The acoustic pressure amplification device is simple in structure and high in operability, and the defect that the output pressure ratio of a traditional linear compressor is low can be greatly overcome. The acoustic pressure amplification device is used in a Sterling-type pulse tube refrigerator. By increasing the pressure amplitude value of the hot end of a heat regenerator and decreasing the volumetric flow rate, losses of the heat regenerator are reduced while acoustic power losses are not increased, the refrigerating machine efficiency is improved, and energy utilization efficiency is also improved.