In the longterm revolution and construction practice, Zhang Wentian scrupulously abides by the party’s aim and practices the partys ideology, and gradually forms his unique thought of Party and Masses. Serving the people is a lifelong career of the communist party members; insisting on the mass line from the masses to the masses; the practice is the highest scale to test the right and wrong of the partys mass line and cutting off from the masses is the most dangerous and fatal error of the ruling party, which is the scientific connotation of his thought. Under the new situation and the new era, the inheritance and practice of Zhang Wentian’s thought of party masses has great practical significance for the socialist construction of China and the realization of the great rejuvenation of the Chinese dream.