A pressure detection method in an apparatus for pressure detection comprising a processing module and a control module, wherein the pressure detection method is configured to detect a pressure generated by an active pen on a screen of an electronic device, wherein there are horizontal and vertical detecting electrodes distributed on the screen, and when a driving signal is transmitted from the active pen to the screen, the detecting electrodes in the screen output a detecting signal corresponding to the driving signal to a touch controller, wherein the detecting signal corresponding to the driving signal is used to determine a position of the active pen by the touch controller; and wherein the active pen comprises a first electrode, a second electrode and a pressure sensor, wherein the first electrode is configured to output a first driving signal, the second electrode is configured to output a second driving signal only when the pressure sensor detects a first pressure generated by the active pen, a first detecting signal corresponding to the first driving signal is configured to determine a first position of the active pen on the screen, and a second detecting signal corresponding to the second driving signal is configured to determine a second position of the active pen on the screen to calibrate the first position, wherein the active pen is configured to output information of the first pressure; pressure detection method comprising: when information of the first pressure transmitted from the active pen is not received, determining, by the processing module, whether the active pen is pressing the screen according to the second detecting signal, wherein if an amplitude of the second detecting signal is greater than a threshold, it is determined that the active pen is pressing the screen and if the amplitude of the second detecting signal is less than the threshold, it is determined that the active pen is not pressing the screen; when it is determined that the active pen is pressing the screen, displaying (320, 505), by the control module, handwriting of the active pen on the screen according to a second pressure, wherein the second pressure is a preset pressure; when the information of the first pressure is received, displaying, by the control module, the handwriting of the active pen on the screen according to the first pressure. when information of the first pressure transmitted from the active pen is not received, determining, by the processing module, whether the active pen is pressing the screen according to the second detecting signal, wherein if an amplitude of the second detecting signal is greater than a threshold, it is determined that the active pen is pressing the screen and if the amplitude of the second detecting signal is less than the threshold, it is determined that the active pen is not pressing the screen; when it is determined that the active pen is pressing the screen, displaying (320, 505), by the control module, handwriting of the active pen on the screen according to a second pressure, wherein the second pressure is a preset pressure; when the information of the first pressure is received, displaying, by the control module, the handwriting of the active pen on the screen according to the first pressure.