A dynamic amplification circuit includes a first drive circuit (310) generates a first driving voltage according to a first control signal and a first driving current; a second drive circuit (320) generates a first driving signal according to the first and a second driving voltage; a third drive circuit (330) generates a second control signal according to the first control signal and the first driving signal; and a dynamic amplifier DA (340) includes a first branch (101) including a first capacitor and a second branch (102) including a second capacitor which are connected by a first resistor (150) and a second resistor (160), an operation state of the DA (340) is controlled through the first and second control signals, a duration of the DA (340) in an amplification phase is proportional to a product of a resistance value of the first resistor and a capacitance value of the first capacitor.