Experimental research on suction performance was carried out on high-speed centrifugal pump with inducer by using closed test. The effect on the characteristic and suction performance of the centrifugal pump was analyzed with no inducer, one and two-phase inducers. It was found that one or two-phase inducers had little influence on the characteristic performance of a centrifugal pump. Compared with no inducer, the head and efficiency decreased slightly by using one inducer, and they slightly increased by using a two-phase inducer. But suction performance of centrifugal pump was improved by using a two-phase inducer.