0.6。 According to official website, WHO inquired the National Education Bureau, and in 2023, the math difficulty coefficient of the college entrance examination increased, and the test questions involved many knowledge points, such as algebra, geometry and trigonometric functions. The difficulty coefficient is a standard to measure the difficulty of the exam. The coefficient is between 0 and 1, and the smaller the coefficient, the more difficult the topic is. 0.7 is simple, 0.3 is difficult, so the math difficulty coefficient of this year's college entrance examination is 0.6.