The utility model relates to a detection device, concretely relates to hawaii fruit quality detecting device, including light receiving module, light -splitting module and optic fibre, light receivingmodule includes a lamp section of thick bamboo and gathers the camera lens, the one end of a lamp section of thick bamboo is equipped with the radiation source, the other end of a lamp section of thick bamboo is equipped with the diaphragm, be equipped with optical fiber seat and base on the collection camera lens, light -splitting module includes the collimation camera lens, the grating, focusing lens and detector, the collimation camera lens, the grating, focusing lens and detector are placed in order, overhead optical fiber seat and the base of being equipped with of collimating mirror, also be equipped with the base on the detector, gather and to link to each other through optic fibre between the overhead optical fiber seat of optical fiber seat and collimating mirror on the camera lens, the utility model provides a technical scheme can effectively overcome prior art and exists does not still have the defect that can carry out the quality detecting device to the hawaii fruit at present.