Abstract: The study on ovarian histology is the basis for the artificial breeding of fish. Therefore， the morphological characteristics of oocytes in the ovary development cycle and in different period of ovarian development and the spawning pattern of Girella leonina were studied with paraffin section. Thus， 165 Girella leonine were obtained in the experiment， the development of oocytes was divided into six phases and the development of the ovaries can be divided into 6 periods. The annual observation found that from August to October the ovaries were in stage Ⅱ while the ovaries entered into stage Ⅲ from September to next March. The egg yolk granules appeared in the oocytes since January and ovaries were in stage Ⅳ occurred in the next March and April. The ovaries went into stage V and started to spwan in April， after ovulation. Ovaries degenerated into stage Ⅵ in July of the next year， and then ovaries developed into stage Ⅱ. Girella leonine got sexual maturity in three years， its gonadal index was low with an average of 261% in the V period of ovarian development. The absolute fecundity of Girella leonine was only 50 000 to 100 000 tablets per tail and the relative fecundity was 4 026 tablets per gram of body weight. Studies have shown that Girella leonine belongs to the fishes that spawn in batch and matured once a year．