In this article, a new lifetime distribution sparked by alpha power transformation is studied. This article aims to propose a new generalization of the Pareto distribution known as alpha power transformed Pareto (APTP) distribution. The APTP distribution provides a better fit than the Pareto and transmuted Pareto distributions. Some mathematical properties of APTP distribution such as moments, quantile function, survival reliability function, conditional reliability function, hazard function and order statistics are derived. For parameter estimation, maximum likelihood, least square and weighted least square and maximum product space, percentiles estimators are used. A river flood data sets are occupied to appearance how the APTP distribution works better in real life.