The invention discloses an analysis and detection method for high purity indium. The analysis and detection method includes the steps that ammonia water is prepared into ultra-pure ammonia water with the free diffusion method; nitric acid is prepared into ultra-pure nitric acid with the sub-boiling distillation method; high purity indium with the grade of 6N or above is dissolved with the ultra-pure nitric acid, then nitrogen oxide is removed through heating, the product is cooled, diluted with water and heated, the ultra-pure ammonia water is added dropwise, stirring and reacting are carried out, the pH value of 2 to 10 of the system serves as the reaction endpoint, and standing clarifying or centrifugal separation is carried out; supernatant liquid is taken, volatilized and concentrated, then the concentrated product is dissolved with the ultra-pure nitric acid, internal standard substances are added, constant volume is achieved, and to-be-detected liquid is obtained; According to ICP-MS measurement, the method is easy to operate, high in sensitivity, good in accuracy and specially suitable for detection of the purity of the high purity indium with the grade of 6N or above.