Free piston Stirling generator with gas path balancing function

The invention provides a free piston Stirling generator with a gas path balancing function. The free piston Stirling generator comprises a shell, a heat exchange assembly, a linear motor, a gas distribution piston, a power piston and a gas path balancing assembly. The heat exchange assembly and the linear motor are sequentially and annularly arranged in the shell in the axis direction of the shell, the air distribution piston and the power piston are movably arranged in the shell, and a sealing gap is formed between the power piston and the shell. An expansion cavity is formed between the gas distribution piston and the first end face of the shell, a compression cavity is formed between the opposite faces of the gas distribution piston and the power piston, and a buffering cavity is formed between the power piston and the second end face of the shell. One end of the gas path balance assembly communicates with the compression cavity, the other end of the gas path balance assembly communicates with the buffer c