The invention provides a multifunctional biochemical analysis device, which includes a biochemical analysis control panel, a support stand, a base, a top seat, a sample suction meter, a liquid outlet pipe, a liquid suction pipe, a biochemical liquid storage tank, and a connecting seat , Biochemical analysis hopper, biochemical analysis sensors and pipes with valves. The vibration-free stirring motor, worm gear reducer, sleeve coupling, stirring shaft, fixed sleeve and stirring bar provided by the present invention are beneficial to existing devices that cannot stir the sample liquid to be analyzed and only affect the analysis results through vibration For the problem of accuracy, the worm gear reducer is driven by the vibration-free stirring motor to drive the sleeve coupling and the stirring shaft to rotate, so that the fixed sleeve and the stirring bar can stir the sample liquid inside the biochemical analysis hopper to ensure the analysis Effect, and ensure the mixing effect of the sample liquid and the reaction liquid, thereby ensuring the accuracy of the analysis results.