It is ok to revise the master's thesis twice for the tutor, but the final version of the thesis needs to be reviewed and revised by the tutor and the relevant departments of the school to ensure the quality and legitimacy of the thesis.

In the process of writing the thesis, the tutor and the relevant departments of the school will review and revise the thesis many times in order to ensure the quality and legitimacy of the thesis. In this process, the tutor can modify the thesis according to the requirements of the school and the tutor to achieve the final requirements.

However, the final version of the paper needs to be reviewed and revised by the tutor and the relevant departments of the school to ensure the quality and legitimacy of the paper. If the tutor's revision of the paper is not recognized by the school and relevant departments, then the paper may not pass the final review and revision.

Therefore, in the process of writing and submitting master's graduation thesis, it is suggested that the thesis should be carefully written and submitted according to the requirements of schools and tutors to ensure the quality and legitimacy of the thesis. If there are any problems or need to be revised, you should communicate with the tutor and relevant departments of the school in time so as to solve the problems in time.