The provision of probationary period in Labor Contract Law not only regulates the deadline，but also provides the minimum wage. Based on Lazear’s self- selection model and combination of Wat- kins’"Q- learner " relation of sequence game theory，and also from regulation perspective of " adverse selection"，this paper，in order to confirm influence of probation terms on decision- making of human resources management，analyzes the influences of the probationary period and the minimum wage in the probation period on the employer's decision: selection decision，probation salary formulation，as well as the salary confirmation after becoming a full member. The result shows that in case that other conditions remain unchanged，when the probationary period is extended，companies tend to reduce the probability of false pretenses: increase the wages of probationary period and lower employee’s wages after their gaining formal qualifications; in case other conditions remain unchanged，when payment of wages in the probationary period is improved，companies tend to increase their selection costs and lower employee’s wages after their gaining formal qualifications. Finally，this paper draws on the inspiration of probationary period legislation.