The invention relates to a plant extraction device, and discloses a plant juice extractor for cosmetic production. The plant juice extractor comprises a base, the middle position of the base is fixedly connected to a first support rod, the top end of the first support rod is fixedly connected to an upper fixing plate, the middle position of the upper surface of the upper fixing plate is fixedly connected to a raw material cylinder, a liquid outlet is formed in the bottom end of the inner wall of the raw material barrel, an outer side plate is fixedly connected to the edge of the upper surface of the upper fixing plate, a material guiding groove is formed between the outer side plate and the outer wall of the raw material barrel, a plurality of scraping plates are arranged in the material guiding groove, a first connecting rod is fixedly connected to the top ends of the scraping plates, the top end of the first connecting rod penetrates through a first guide groove formed in the top end of the material guiding groove to be fixedly connected to a fixing ring. a screw rod is fixedly connected to the center position inside the raw material cylinder, and a pressing block is arranged on the screw rod. According to the plant juice extractor, through arrangement of the screw rod, the pressing block is rotated and lifted, so that plant raw materials are rotated and extruded, the plant raw materials are extruded by the device more thoroughly, the extraction rate of juice is increased, and the practicability of the device is improved.