Based on the multimedia control theory, the mechanical bionic intelligent control is studied, and this theory is applied to the subjectivity analysis of college students employment to establish the mathematical model of mechanical bionic intelligent control, and to design automatic control algorithm. In order to validate the effect of mathematical model and algorithm, this paper compares the designed adaptive algorithm with 3 kinds of traditional genetic algorithm. From the calculation, we find that the adaptive algorithm in the fitness value of the solution and the mean is obviously better than that of the traditional genetic algorithm. While for the search of the optimal solution, the adaptive algorithm is fast and has high precision. The crossover and mutation rate of 20-100 generation calculation results show that the mutation rate is controlled within 0.1, which can meet the design requirement of accuracy, and can provide a theoretical reference for the study of mechanical automation control theory.