"Three new" refers to the new curriculum standard, the new curriculum, the new college entrance examination. Under the background of "Three New Times", the optimal writing teaching strategy of senior high school Chinese teachers can help students better understand and master Chinese knowledge and improve Chinese comprehensive quality. Writing teaching can guide students to establish correct values and cultivate good moral qualities. This work first discusses the communicative context writing teaching of high school Chinese under the new curriculum standard and the evaluation of high school Chinese writing teaching under the background of the new curriculum standard. Secondly, it discusses the writing knowledge system of unified edition high school Chinese textbooks under the new curriculum perspective, the writing task characteristics and teaching strategy of unified edition high school Chinese textbook units based on the new curriculum, and the logical thinking cultivation strategy of high school Chinese thinking writing teaching based on the new college entrance examination. Through the research of this work, we hope to promote the innovative development of Chinese writing teaching in senior high school.