The invention discloses a pericardial paracentesis device for the cardiology department. The device structurally comprises a catheter, a pericardial puncture mechanism, an antiskid sleeve and a dust-proof cover; the top of the puncture mechanism is connected to the catheter, the bottom of the pericardial puncture mechanism is buckled with the dustproof cover, and the antiskid sleeve with antiskidparticles sleeves the pericardial puncture mechanism. Compared with the prior art, the device has the advantages that through the combined arrangement of a limiting base, a syringe, a puncture needlegroup, a spring group, a limiting ring and two claws, the high requirement of pericardial puncture for the numerical value of the penetration depth can be met; the pressing frequency of a pressing head is in direct proportion to the expansion amount of puncture needles, the numerical value can be freely adjusted in the expansion range of the pressing head, and the demand of the puncture needles for different penetration depths can be met. The penetration depth is precise, the penetration range is wide, the safe usability of the puncture needles is improved conveniently, the accuracy, stabilityand safety of pericardiocentesis are improved conveniently, hydrops can be extracted out in different directions, the efficiency of extracting the hydrops is improved, and the pain of patients is relieved.