The study considers the phenomenology of the professional crisis of the teacher personality in the context of the transition to online learning. Based on the analysis of the results of the theoretical and empirical research involving 170 teachers, it was established that the features of the professional crisis of the teacher personality are the transformation of the value-semantic sphere of the personality and the actualization of reflexive and anticipation processes. The results of the empirical research allowed for the first time to reveal the features of the professional crisis of the teacher in the context of the transition. The experimental group had the life efficiency indicator on the level 47.92 out of 100 points, while the control group -- 69.59 points, which is not a much higher indicator. The results can become an empirical basis for the development of programs of psychological and pedagogical support for teachers experiencing professional crisis situations when implementing online learning programs.