The rocket rain enhancement effectiveness has been an issue of public concern. The rain enhancement with rockets has the characteristics of less investment, easy operation, and remarkable effect. The Longcheng district government began to invest in rocket rain enhancement from 2003, and since then rocket rain enhancement operations have been conducted successively in crop growing season. By means of precipitation variation analysis and contrast between affected and nonaffected areas, the rain enhancement operations in three years in the Longcheng district are analyzed and the assessment of rocket rain enhancement effectiveness is conducted. It is concluded that the effectiveness of rain enhancement with rockets is about 33%.