Abstract: According to the histological and morphological analysis,the ovary of selenocosmia huwena is composed of the ovarian tubule,which are sticking out from geninal epithelium into ovarian carity.Nutrition is provided through the pads which are made up of the nutrient cells during oocyte developing process.There are five stages in the ovary development:formation stage,mature stage,growth stage,ovulation stage and recovery stage.The spider can lay eggs several times in the reproductive periods.So it is polyovulation type.There are  positive correlation in the size and weight of the ovary with the weight  of the spider’s body.The sexual gland exponent of the spider is changing with the oocyte developing but not with the size of the mature individuals.

Key words: selenocosmia huwena, ovary development, histology