This paper introduces the design of a recyclable pregnancy test circuit based on photoelectric detection technology. The design uses the gold label test paper as the primary sensor and the photoelectric sensor as the secondary sensor, uses the gold label to detect the sensitivity of the color region of the test paper to the specific wavelength of light, and carefully selects the matching light source wavelength. And through the person of different pregnancy chorionic gonadotropin human chorionic gonadotropin (HCG), the concentration of standard sample for calibration, and then realize the gold test color fast and accurate testing results. The circuit parameters are optimized by orthogonal experiment, and the optimal combination is determined by variance analysis and range analysis. The experimental results show that the circuit system designed in this paper is stable and reliable. Compared with traditional pregnancy test paper and disposable electronic pregnancy test products, the detection method proposed in this paper can not only realize non-contact measurement and repeated use, but also has high measurement accuracy and portability, and has broad application prospects.