The invention relates to a full automatic normal analyzer control circuit which belongs to the field of medical detection. A circuit part of the invention mainly consists of an MCU, a motor drive circuit, a peristaltic pump, a photosensitive resister, an amplification circuit, a solenoid valve, a work indicator light, a key, an amplification circuit, a photosensitive cell, a PC and a MAX232. The programmer design cycle of the invention is that: start a machine, initialization of the system, wait online, and self-inspection of the instrument after successful online. The solenoid valve has self-inspection orderly and can inspect by closing the machine if any difference is found. After self-inspection, the instrument starts cleaning procedure to clean a pipeline system. After cleaning, the instrument is on a standby state, waiting for an order, to enter into the procedures of cleaning, mixing evenly, sample introduction, setting of parameters, automatic operation and manual operation. Being used for the normal analyzer, the invention can greatly reduce the error by a human factor, improve the repeatability of detection obviously and ensure the quality control of the medical normal detection.