The invention discloses a full-automatic spermatid detector. A seminal fluid sample enters a liquid flow system after being subjected to sample suction, reagent adding and mixed reaction dyeing, the liquid flow system is used for conveying the seminal fluid sample subjected to reaction dyeing to a reaction detection chamber, the seminal fluid sample is subjected to excitation detection by a laseremitted from a laser optical system, a light signal obtained after excitation is collected by a photoelectric detecting system, statistic analysis of data is carried out after the light signal is converted to a digital signal by a control system, and according to data features and a cluster analysis algorithm, semen quality parameter results such as the total quantity of semen, density, core wholeness, mitochondrion membrane potential and acrosomal reaction of the to-be-detected seminal fluid sample are worked out. Full-automatic high-flux rapid detection and analysis of the seminal fluid sample are achieved, full-automatic operation can be carried out after a user places the seminal fluid sample in a sample pond, detection and analysis results are automatically output, the full-automaticspermatid detector can be directly connected to a Lis/His system of a hospital to achieve seamless connection of data management, and the full-automatic spermatid detector is easy and convenient to operate, capable of achieving one-key intelligence, low in cost and wide in adaptability.