Abstract: Along with oil field development, gas influences well production obviously, and it's also the main reason of low well pump efficiency. Gas anchor is an effective way to enhance pump efficiency, so to develop new gas anchor is of great importance. Contrast study between multi-cups gas anchor and ordinary gas anchor was done, and well head air output and degasification efficiency under different gas/liquid ratio, pump effciency relations with liquid level drawdown rate were studied too. The experimental result indicates multi-cups gas anchor was of low well head air output, and high degasification and pump efficiency.