An experiment device for exhibiting the Rosensweig peak of ferrofluid was designed . The variation of the number and gap of the Rosensweig peak was studied for different magnetic induc‐tion .The spatial distribution of magnetic field was demonstrated dynamically ,its evolution under dif‐ferent magnetic induction was exhibited .The number of peaks increased with increasing magnetic in‐duction .When magnetic induction was up to 250 mT ,the variance of the number of peaks slowed down .When magnetic induction was weak ,the Rosensweig peaks were sparse and the gap was wide , and the distribution of magnetic induction line was sparse .When magnetic induction became stronger , the Rosensweig peaks turned out to be dense and the gap was narrow ,and the distribution of magnetic induction line was also dense .%设计了磁性液体Rosensweig尖峰展示球实验装置，研究了不同磁感应强度时Rosensweig尖峰的个数和间距的变化，展现了铁球磁体的磁场三维分布，演示了磁场空间分布随磁感应强度的变化。实验结果表明：磁性液体Rosensweig尖峰个数随磁感应强度的增强而逐渐增加，当磁感应强度达到250 mT 后，尖峰个数趋于平缓。当磁感应强度较弱时，磁性液体Rosensweig尖峰分布稀疏，尖峰之间间距较大，铁球磁体周围磁感线分布稀疏；当磁感应强度较强时，Rosensweig尖峰分布密集，尖峰之间间距较小，铁球磁体周围的磁感线分布密集。
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