The invention discloses a fast Chinese 
pinyin input method based on a touch sensitive device and an achieving 
system thereof. The method includes that a marking tool is used for clicking an initial 
soft keyboard of a touch screen to input an initial 
consonant of 
pinyin; a 
system pops out a 
vowel suspension 
soft keyboard covered around an initial 
consonant key automatically; the marking tool is used for sliding on the 
vowel suspension 
soft keyboard for at most two key positions, and vowels of the 
pinyin are input; and the marking tool is lifted, and the 
vowel suspension soft keyboard is hidden automatically. 
Technical systems of six portions are combined and include (1) a suspension soft keyboard 
system; (2) seven suspension soft keyboards and key position layouts of the seven suspension soft keyboards; (3) a 'one-key one-pinyin' fast 
pinyin input method; (4) a 'one-character one-key' 
sentence input mode; (5) a non-switch 
stroke assisting technology; (6) a fast part 
input method. By means of the method and the system, only once key clicking is conducted, simplified pinyin and full pinyin are conducted simultaneously, and efficient inputting can be conducted without changing a pinyin scheme or initial soft keyboard setting. Simultaneously, touch screen size limit is broken through, key false 
identification rate is low, operation fatigue is small, and high-speed 
typing can be conducted even if a user does not know the pinyin.