Traditional management methods have become increasingly unsuitable for the development needs of software development projects.It is urgent to introduce modern project management into software development projects.As one of the nine knowledge systems of project management,schedule control is one of the three management functions of project management and an essential branch of project management.Schedule control is the critical management link to ensure that the project is completed on schedule.Based on this background,this paper studies the schedule control of software projects.Firstly,this paper systematically examines the project management techniques and tools of software development projects and provides a reference for similar software development projects.Secondly,the paper studies and analyses the problems of project schedule control in Z Company;In the form of interviews and questionnaires,it studies the existing issues in software projects of Z company,such as frequent changes in requirements,less communication,insufficient project participants and weak control links of project schedule,and analyses the main reasons for these problems,and puts forward corresponding optimization measures from these four aspects.Thirdly,this paper takes project A as an example to apply the above criteria The implementation results show that the schedule control method can effectively shorten the project duration and improve the project schedule.This paper not only has practical significance to solve the problem of project schedule delay in Z Company but also can provide reference and reference for other companies in the industry