The invention discloses a crankshaft for a reciprocating compressor and the reciprocating compressor with the crankshaft. The crankshaft for the reciprocating compressor comprises a main shaft, an auxiliary shaft and a crank arm. The main shaft and the auxiliary shaft are arranged on the two sides of the crank arm correspondingly. A first counter bore and a second counter bore are formed in the two sides of the crank arm correspondingly. The main shaft is installed in the first counter bore. The auxiliary shaft is installed in the second counter bore. According to the crankshaft for the reciprocating compressor provided by the embodiment of the invention, the main shaft, the auxiliary shaft and the crank arm are independent parts, so that the crankshaft is formed easily and easy to machine. Compared with a traditional casting technique, the mass, the material cost and the machining cost of the crankshaft can be greatly reduced, the power of the reciprocating compressor during operation is reduced to a certain extent, and the reliability of the reciprocating compressor is improved.