Disclosed are an elasticity detection method and device. The method comprises: an excitation device (2) exciting, periodically at preset time intervals, N shear waves in tissue, and controlling an ultrasonic transducer (3) to send ultrasonic waves to the tissue (101), the excitation device (2) and the ultrasonic transducer (3) being in contact with the surface of the tissue receiving, by means of the ultrasonic transducer (3), an ultrasonic echo signal corresponding to each shear wave (102) on the basis of the ultrasonic echo signal corresponding to each shear wave, obtaining the propagation characteristic parameter of each shear wave (103) and on the basis of the propagation characteristic parameters of the N shear waves and the tissue density of the tissue, calculating to obtain the elasticity parameter of the tissue (104). The excitation device (2) and the ultrasonic transducer (3) are kept in contact with the surface of the tissue and the excitation device (2) does not need multiple times of manual positioning at the surface of the tissue. The invention ensures that the N shear waves are excited corresponding to the same position, and can guarantee the accuracy of the elasticity parameter detection result.
