A rotary cylinder piston compressor pump, comprising a rotating shaft (2), a piston (3) and a cylinder (4), a rotating shaft hole (21) being provided in the rotating shaft (2), and an oil guiding channel, provided in the cylinder (4), communicating with the rotating shaft hole (21),
- wherein a recess (45) is formed in an inner end face of the cylinder (4), an oil path (61) sealed relative to a compression cavity (49) of the cylinder (4) is formed between the recess (45) and the piston (3), and the oil path (61) between the recess (45) and the piston (3) is communicated with an oil path (62) between the piston (3) and the rotating shaft (2) and is communicated with the oil guiding channel by means of an oil returning channel,
- the oil returning channel comprises a cylinder oil hole (46) provided on the cylinder (4), and the cylinder oil hole (46) penetrates through a bottom of the recess (45) and an outer surface of the cylinder (4).