A compressor comprising: a cylinder, a piston assembled in the cylinder, a piston pin, a swing rod, a crank pin assembled in a sliding groove of the swing rod, a crankshaft, a machine base equipped with the swing rod, and characterized by comprising a curved connecting rod, one end of which is assembled on the swing rod and the other end is connected to the piston through the piston pin, wherein the curved connecting rod is formed by a first part, a second part and a third part, wherein a first end portion of the first part of the curved connecting rod is connected to a first end portion of the second part of the curved connecting rod, and a second end portion of the second part of the curved connecting rod is connected to a first end portion of the third part of the curved connecting rod at an apex-liked bend to form a curved apex of the curved connecting rod, wherein a piston pin hole is formed at a second end portion of the first part of the curved connecting rod, and an assembly hole is formed at a second end portion of the third part of the curved connecting rod, and wherein the piston pin hole and the assembly hole are assembled along a same first centerline, a second centerline is a centerline of the first part of the curved connecting rod and is in connection with the piston pin hole, the first part of the curved connecting rod extends along the second centerline, a third centerline is a centerline of the second part of the curved connecting rod, the second part of the curved connecting rod extends along the third centerline, a fourth centerline is a centerline of the third part of the curved connecting rod, the third part of the curved connecting rod extends along the fourth centerline, the second centerline and the third centerline are in connection with the fourth centerline, the first centerline and the third centerline form a first angle, the first centerline and the fourth centerline form a second angle, and the second centerline and first centerline form a third angle. a cylinder, a piston assembled in the cylinder, a piston pin, a swing rod, a crank pin assembled in a sliding groove of the swing rod, a crankshaft, a machine base equipped with the swing rod, and characterized by comprising a curved connecting rod, one end of which is assembled on the swing rod and the other end is connected to the piston through the piston pin, wherein the curved connecting rod is formed by a first part, a second part and a third part, wherein a first end portion of the first part of the curved connecting rod is connected to a first end portion of the second part of the curved connecting rod, and a second end portion of the second part of the curved connecting rod is connected to a first end portion of the third part of the curved connecting rod at an apex-liked bend to form a curved apex of the curved connecting rod, wherein a piston pin hole is formed at a second end portion of the first part of the curved connecting rod, and an assembly hole is formed at a second end portion of the third part of the curved connecting rod, and wherein the piston pin hole and the assembly hole are assembled along a same first centerline, a second centerline is a centerline of the first part of the curved connecting rod and is in connection with the piston pin hole, the first part of the curved connecting rod extends along the second centerline, a third centerline is a centerline of the second part of the curved connecting rod, the second part of the curved connecting rod extends along the third centerline, a fourth centerline is a centerline of the third part of the curved connecting rod, the third part of the curved connecting rod extends along the fourth centerline, the second centerline and the third centerline are in connection with the fourth centerline, the first centerline and the third centerline form a first angle, the first centerline and the fourth centerline form a second angle, and the second centerline and first centerline form a third angle.